WO2023249525A1

WO2023249525A1 - Sight mounting system, sight, and adapter plate

Info

Publication number: WO2023249525A1
Application number: PCT/SE2022/050633
Authority: WO
Inventors: Niklas Larsson
Original assignee: Aimpoint Ab
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-12-28

Abstract

A sight mounting system (300; 400) for mounting an optical sight (200; 500) to a firearm, comprising: a sight mounting interface (110; 410), and an oblong dovetail member (305), wherein the oblong dovetail member (305) is arranged to be forced in close contact with a leaning back wall (125) of the sight mounting interface (110) and a leaning rear face (240; 540) of the optical sight (200; 500), wherein the leaning front face (245; 545) of the reflex sight is forced against the leaning front wall (135) of the sight mounting interface (110). An optical sight (200) for mounting to a sight mounting interface (110; 410), and an adapter plate for mounting a sight to a sight mounting interface

Description

SIGHT MOUNTING SYSTEM, SIGHT, AND ADAPTER PLATE

TECHNICAL FIELD

The present disclosure relates to a sight mounting system, sight, and adapter plate, and more particularly to a sight mounting system for mounting a sight to a firearm, a sight for mounting to a sight mounting interface, and an adapter plate for mounting a sight to a firearm.

BACKGROUND

It is common to use detachably mounted aiming devices on firearms, such as hunting rifles. Recently, it has also become increasingly common to use detachably arranged aiming devices on smaller firearms, such as pistols and revolvers. The aiming devices may be optical sights, including both magnifying and non-magnifying sights.

Reflex sights, also known as red dot sights are popular non-magnifying sights. Due to the advantageous features, reflex sights are commonly used on firearms, such as hunting rifles, shotguns, automatic and semi-automatic rifles, and also on small firearms, such as handguns.

Regardless of which aiming device that is mounted on a firearm, both the aiming device and mount are exposed to different kind of stresses during use. Particularly, this applies to sights that are mounted on smaller arms, such as pistols. Firearms for hunting, police or military are used in different environments and weather conditions that expose both the sight and mounting assembly to different kind of stresses. This can be for example rain, snow, dirt, temperature variations, shocks or recoil when firing the firearm. Such conditions place great demands on both the sight device and associated mount.

Manufacture of large series can lead to variations in geometric tolerances of both the aiming device and assembly. In addition, the firearm, mount, and sight are commonly provided by different manufacturers. Such circumstances may adversely affect the conditions for the various parts to fit together, thereby preventing that the aiming device from being mounted on the weapon in a correct and robust way. Geometric variations that may occur during manufacture can lead to a gap between the sight and the various parts of the assembly. This, in turn, can make it more difficult to sighting in or that the sight will not keep it’s zeroing, since the sight and the firearm cannot be aligned, that the sight is moved, or even comes loose as a result of repeated firing. Usually, attempts are made to reduce these shortcomings by manual finishing of the sight and/or mount, so that the components should fit together at least reasonably.

This process is both time consuming and costly. In addition, it is not possible to move either sight or mount to another weapon without further manual processing to fit the sight and the mount to the specific firearm.

There are different previously known approaches and technical solutions for mounting sights on firearms. A number of solutions are based on the sight being attached to the firearm via a rail mounted on the firearm, for example Weaver rail, developed by W. R Weaver Co., or Picatinny rail, developed by the US military. Although both of these rails provide a robust mounting of the sight, they can cause problems with the center of the sight over the center of bore of the firearm. These two rails also provide high mounts, i.e forming a distance between the bore of the firearm and the line of sight through the sight, which may have a negative impact on the possibility to hit a target on different distances. Moreover, the rails are expensive to machine and are not suitable for mounting smaller sights on handguns.

One way to mount smaller sights on handguns is to use screw joints in combination with guide pins. This is an expensive and precision-demanding solution, which often leads to an undesirable movement between the sight and the firearm as a result of repeated firing, which in turn results in a changed shot grouping. This technology assumes that the screws are able to be mounted through a central part of the sight. A problem with that solution is that if the sight is a closed design instead of an open design, the screws cannot be mounted from above as they would have to go through the sealing walls of the sight. Consequently, this approach only works for mounting of sights of an open design.

Prior art mounting systems for mini red dot sights uses a combination of screw fastening and pins. US2021/0270572 describes a sight system comprising a fixed open sight configured with a sighting notch, and a reflex sight arranged for use as a rear sight system for a slide on a pistol. The reflex sight is an open reflex sight, which is attached to a slide using two screws, arranged laterally with one on each side of the longitudinal axis of the open reflex sight. Pins are used to stabilize the attachment of the reflex sight to the slide.

However, this is an expensive and precision-demanding solution, which, despite this, often leads to an undesirable movement between the sight and the weapon, which in turn results in a displacement of the shot grouping. WO2021/145953 describes a slide assembly including a slide, front and rear iron sights for permitting a user to aim the firearm in a conventional fashion. The slide includes a bottom side and a top side provided at a proximal end with a mounting recess having one or more retaining holes for receiving an optic sight. The optic sight includes a viewfinder operable to project a reflexive or holographic bright dot and a base plate having two mounting holes, to receive respective screw fasteners for rigidly affixing optic sight to slide via threaded retaining holes in the mounting recess of the slide. When affixing an optic sight with a shorter length, a gap will form, for example, between the proximal end of mounting recess and the proximal end of a mounted optic sight. This gap may reduce support provided to the optic sight which, in turn, may lead to damage of the sight or sheering of fasteners resulting from extreme forces produced by reciprocation of slide. One or more keyed spacers may be positioned to fill the gap and provide additional support for the optic sight. The keyed spacers may also be provided with one or more cams having coupled screws, whereby tightening of the screws urges the cams against, the back of optic sight to further improve the grip between keyed spacers and optic sight.

These prior art sight mounting systems have the drawback that they are only configured for open optic sights, such as open mini red dot sights.

US2022034631 describes a mounting system for mounting a closed mini red dot sight (MRDS) to a firearm. The mounting system comprises accessory mounting structures including protuberances and threaded openings. The protuberances assist in aligning an accessory on the firearm, and the threaded openings engage screws. The mounting system comprises a number of elements including a dovetail connection component having an upper surface including two screw holes allowing the dovetail connection component to be secured to the firearm. The bottom surface of the closed MRDS includes a number of channels, which allow the mini red dot sight to slidingly connect with the dovetail connection component and also be compatible with the accessory mounting structures of the firearm. Moreover, a recessed portion extending along a length of the side of the MRDS is provided with screw holes arranged to secure a side plate. The side plate has a screw holes corresponding to the screw holes of the MRDS. Screws are tightened in the holes which clamps the side cover plate to the MRDS. This is an expensive and precision-demanding solution involving a number of elements requiring multiple mounting steps for fastening the MRDS to the firearm. The present inventor has realized that there is room for improvements in this regard. Hence, the present inventor has identified both the need for and the benefits of a novel and inventive mounting system for mounting a sight to a firearm.

SUMMARY

It is accordingly an object of the teachings of this application to solve, eliminate, mitigate or reduce obviate at least some of the problems and disadvantages referred to above.

In accordance with one aspect of the present disclosure, this is achieved by a a sight mounting system for mounting a sight. The sight mounting system comprises a sight mounting interface including a leaning back wall, a planar longitudinal mounting surface, and leaning front wall for receiving the sight; an oblong dovetail member having a planar upper surface, planar lower surface, a first long side and second long side both sides leaning inwards from the upper surface down to the lower surface, the upper surface having at least two screw holes for receiving screws through the oblong dovetail member and threaded into tapped holes of the sight mounting interface; wherein the oblong dovetail member is arranged to be forced in close contact with the leaning back wall of the sight mounting interface and a leaning rear face of the sight, wherein at least a portion of the leaning front face of the reflex sight is forced against at least a portion of the leaning front wall of the sight mounting interface.

In advantageous embodiments, the sight mounting interface is provided with a groove extending along at least a part of the longitudinal mounting surface and arranged to receive a longitudinal tenon proximally centered along a longitudinal direction of a bottom surface of the sight, wherein the length and depth of the groove are arranged to closely match the length and height of the tenon, wherein longitudinal inside surfaces of the groove are arranged to engage with longitudinal wall surfaces of the tenon.

In advantageous embodiments, the longitudinal inside surfaces of the groove lean inwards by angles in a direction to a bottom of the groove forming the center of the mounting surface of the sight mounting interface for receiving the longitudinal wall surfaces leaning inwards by angles in a direction to the center of the bottom surface the tenon.

In advantageous embodiments, the back wall leans backwards by an angle a with reference to a normal vector of the planar mounting surface, so as to fit the first long side of the oblong dovetail member, and the front wall leans backwards by an angle 0 with reference to the normal vector of the planar mounting surface, so as to fit the front surface of the sight.

In advantageous embodiments, the back wall comprises a vertical portion extending from the planar mounting surface to a leaning portion of the back wall, and the front wall comprises a first vertical portion extending from the planar mounting surface to a leaning portion extending to a second vertical portion of the front wall.

In advantageous embodiments, a leaning portion of the front face of the reflex sight engages the leaning portion of the front wall of the sight mounting interface, thereby forming a small gap between a first vertical portion of the front face of the reflex sight and the first vertical portion of the front wall.

In advantageous embodiments, a small gap exists between the planar lower surface of the oblong dovetail member and the mounting surface of the sight mounting interface, and a small gap exists between the bottom surface of the reflex sight and the mounting surface, when the sight mounting system is assembled.

According to a second aspect, there is provided a sight mounting system for mounting a sight to a firearm, comprising: a sight mounting interface having a leaning back wall, a planar and longitudinal mounting surface, and leaning front wall for receiving the sight; an oblong dovetail member having a planar upper surface, planar lower surface, a first long side and second long side both sides leaning inwards from the upper surface down to the lower surface, the upper surface having at least two screw holes for receiving screws through the oblong dovetail member and threaded into tapped holes of the sight mounting interface; wherein the oblong dovetail member is arranged to be forced in close contact with the leaning front wall of the sight mounting interface and the leaning front face of the sight, wherein at least a portion of the leaning rear face of the sight is forced against at least a portion of the leaning back wall of the sight mounting interface.

In advantageous embodiments the sight mounting interface is provided with a longitudinal tenon extending along at least a part of the longitudinal mounting surface arranged to engage with a corresponding longitudinal groove proximally centered along a longitudinal direction of a bottom surface of the sight, wherein the length and depth of the tenon is arranged to closely match the length and height of the groove, wherein longitudinal wall surfaces of the tenon are arranged to engage with longitudinal inside surfaces of the groove. In advantageous embodiments, the longitudinal wall surfaces leaning inwards by angles in a direction to the center of the bottom surface of the tenon for engaging with the longitudinal inside surfaces of the groove leaning inwards by an angle in a direction to the center of a bottom surface of the sight.

In advantageous embodiments, the back wall leans forwards by an angle a in relation to a normal vector of the mounting surface, so as to fit the rear surface of the sight, and the front wall leans forwards by an angle P with reference to the normal vector if the planar mounting surface, so as to fit the second long side of the oblong dovetail member.

In advantageous embodiments, the back wall comprises a first vertical portion of the back wall extending from the planar mounting surface to a leaning portion connecting a second vertical portion of the back wall, and the front wall comprises a vertical portion of the front wall extending from the planar mounting surface to a leaning portion of the front wall.

In advantageous embodiments, a leaning portion of the rear face of the reflex sight engages a leaning portion of the back wall of the sight mounting interface, thereby forming a small gap between a first vertical portion of the rear face of the reflex sight and a first vertical portion of the back wall.

In advantageous embodiments, a small gap exists between the planar lower surface of the oblong dovetail member and the mounting surface, and a small gap exists between the bottom surface of the reflex sight and the mounting surface, when the sight mounting system is assembled.

In some embodiments, the sight mounting interface is arranged on a slide for a firearm, or on a another sight to be mounted on a firearm, lightweight artillery system or man-portable launcher.

In some embodiments, the oblong dovetail member is provided with an auxiliary open sight, which forms an integrated part of the oblong dovetail member; or a removable part, which is arranged in a sight receiver on a protrusion of the oblong dovetail member.

According to a third aspect, there is provided asight for mounting to a sight mounting interface, wherein the sight comprises a housing having a base with a bottom surface provided with a longitudinal tenon, wherein the longitudinal tenon has longitudinal wall surfaces leaning inwards by angles in a direction to the center of the bottom surface for engaging corresponding leaning longitudinal inside surfaces of a groove of the sight mounting interface, the front face leans backwards to engage a front wall of said sight mounting interface, and the rear face leans forwards to engage an oblong dovetail member forming a removable attachment element for securing the sight to the sight mounting interface.

According to a fourth aspect, there is provided a sight for mounting to a sight mounting interface, wherein the sight comprises a housing having a base with a bottom surface provided with a longitudinal groove, wherein the longitudinal groove has longitudinal inside surfaces leaning inwards by angles in a direction to the center of the bottom surface for engaging corresponding leaning longitudinal wall surfaces of a tenon of the sight mounting interface, the front face leans backwards to engage a front wall of said sight mounting interface, and the rear face leans forwards to engage an oblong dovetail member forming a removable attachment element for securing the sight to the sight mounting interface.

In advantageous embodiments, the rear face of the sight forms at least two portions including a vertical portion extending upwardly from the bottom surface to a leaning portion.

In advantageous embodiments, the front face of the sight forms at least three portions including a first vertical portion extending upwardly from the bottom surface to a leaning portion connecting a second vertical portion.

In advantageous embodiments, the sight is a closed reflex sight having optical elements completely encased by the housing.

In some embodiments, the sight is a red dot sight.

According to a fifth aspect, there is provided an adapter plate for mounting a sight to a firearm, wherein the adapter plate has a base with a top surface for attachment to the sight and a bottom surface provided with a longitudinal tenon, wherein the longitudinal tenon has longitudinal wall surfaces leaning inwards by angles in a direction to the center of the bottom surface for engaging corresponding leaning longitudinal inside surfaces of a groove of the sight mounting interface, the front face leans backwards to engage a front wall of said sight mounting interface, and the rear face leans forwards to engage an oblong dovetail member forming a removable attachment element for securing the adapter plate to the sight mounting interface.

According to a fifth aspect, there is provided an adapter plate for mounting a sight to a firearm, the adapter plate has a base with a top surface for attachment to the sight and a bottom surface provided with a longitudinal groove, wherein the longitudinal tenon has longitudinal wall surfaces leaning inwards by angles in a direction to the center of the bottom surface for engaging corresponding leaning longitudinal inside surfaces of a groove of the sight mounting interface, the rear face leans forwards to engage a back wall of said sight mounting interface, and the front face leans backwards to engage an oblong dovetail member forming a removable attachment element for securing the adapter plate to the sight mounting interface.

An advantage of some embodiments of the present disclosure is that a closed reflex sight may be mounted to a firearm without play. Moreover, the mounting system minimize or eliminate play by utilizing the exterior geometry of the sight housing thereby creating a clamping joint without additional machining of the sight housing.

Another advantage of some embodiments of the present disclosure is that the mounting system is recoil proof and resistant to reciprocation of a slide.

A further advantage of some embodiments of the present disclosure is that differences in geometric tolerances in the different parts of the mounting system and sight may vary without a play occurring in the assembly including the sight and mount.

Moreover, the large force arising on the mounting system when a shot is fired can be absorbed without the target point being moved when the firearm is fired repeatedly.

Still another advantage of some embodiments of the present disclosure is that the mounting interface is easy to process and therefore cheap to manufacture in large volumes.

Other aspects and features of the invention and its embodiments are defined by the appended patent claims and are further explained, together with problems solved and advantages obtained, in the detailed description section as well as in the drawings.

It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps, or components, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

All terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, device, component, means, etc are to be interpreted openly as referring to at least one instance of the element, device, component, means, etc., unless explicitly stated otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments is illustrated by way of example in the accompanying drawings in which like reference numbers indicate the same or similar elements and in which:

FIG. 1 is a perspective view of a slide for a firearm having a sight receiver according to an embodiment;

FIG. 2 is a side view of the rear portion of the slide shown in FIG. 1;

FIG. 3 is a right side view of a closed reflex sight according to an embodiment;

FIG. 4 is a left side view of the closed reflex sight shown in FIG. 3;

FIG. 5 is a perspective view of the closed reflex sight shown in FIG. 4;

FIG. 6 is an exploded side view of a sight mounting system for a firearm according to an embodiment;

FIG. 7 is a side view of the assembled sight mounting system shown in FIG. 6;

FIG. 8 is an exploded perspective view of a sight mounting system according to an embodiment;

FIG. 9 is a side view of the assembled sight mounting system shown in FIG. 8;

FIG. 10 is an exploded perspective view of a sight mounting system according to an embodiment;

FIG. 11 is a side view of the assembled sight mounting system shown in FIG. 10.

FIG. 12 is a perspective view of an attachment member of a sight mounting system according to an alternative embodiment;

FIG. 13 is a perspective view of an attachment member of a sight mounting system according to an alternative embodiment;

FIG. 14 is a perspective view of an adapter plate according to an embodiment; and

FIG. 15 is a bottom perspective view of the adapter plate in FIG. 14.

DESCRIPTION OF EMBODIMENTS

Embodiments of the invention will be described with reference to FIGs 1-13, which all illustrate schematically example arrangements according to some embodiments of the invention. Any equivalent variation and modification made according to appended claims are covered by the claims.

Reference will now be made to the figures to describe the embodiments in detail. The same reference signs are used for corresponding features in different figures. Reference is made to FIG. 1, which illustrates a slide 100 for a firearm, for example but not limited to, a handgun or a pistol, having a sight mounting interface 110 in accordance with an exemplary embodiment of the subject disclosure. The slide 100 is configured to be arranged on a firearm frame or receiver integrating other components forming a complete firearm.

The sight mounting interface 110 may be a milled recess or optic cut configured to receive a sight, such as an optical sight, that can be mounted on the slide 100 in the rear portion of the slide, i.e the portion of the slide which is located next to the shooter or marksman holding the firearm during conventional usage. The slide 100 may comprise a front sight receiver 115 arranged on a top surface 120 in a front portion of the slide 100.

As illustrated in FIG. 1, the sight mounting interface 110 comprises a back wall 125, a generally planar and longitudinal mounting surface 130, and a front wall 135. A groove 140 may be machined, for example milled, in the longitudinal mounting surface 130. The groove 140 may extend along at least a part of, but preferably along the main part of, the longitudinal mounting surface 130. Advantageously, the groove 140 is aligned with the slide and barrel of the firearm. Further, the sight mounting interface 110 may have two tapped holes 145 provided on each side of the longitudinal surface, proximate the back wall 125 in this embodiment.

A rear sight receiver 150 may be machined or milled as a slot between the front wall 135 of the sight receiver 110 and an ejection port 155 of the slide 100. The rear sight receiver 150 may be a dovetail slot extending perpendicular to the longitudinal direction of the slide 100.

FIG. 2 illustrates the rear portion of the slide 100 comprising the sight mounting interface 110. The back wall 125 leans backwards in relation to the mounting surface 130, so as to fit a corresponding surface of an attachment element, described later. The front wall 135 leans backwards in relation to the mounting surface 130, so as to fit the corresponding front surface of a housing of a sight 200 as shown in FIGs. 3-5 or an adapter plate, such as a mounting plate described later.

In this embodiment, the sight 200 is a closed reflex sight comprising a housing 205 forming a rear frame 210 holding a protective rear glass 215, a front frame 220 holding a viewing lens 225, a base 226 with a bottom surface 230 provided with a longitudinal tenon 235. Optical elements of the sight 200 comprises a battery powered light source, such as, but not limited to, a red light-emitting diode (LED) arranged in a light channel inside the housing 205 to project a beam of light through a path of the sight. The light beam is reflected by a reflective surface of the viewing lens 225 in a direction towards the protective rear glass 215. Thereby, a viewer, i.e a shooter or marksman, is allowed to see an infinity image of an illuminated reticle created, a red dot in this embodiment, by the reflected light beam and the field of view at the same time, while the viewer looks through the reflex sight 200 via the protective rear glass 215.

Hence, the optical elements of the reflex sight 200 is completely encased and thereby protected from any dirt, moisture, snow, and from being damaged when used even in poor conditions. In some embodiments, a front glass may be mounted in front of the viewing lens 225 for protecting the lens from dirt, moisture, snow, fingerprints and from being scratched.

According to some embodiments, a battery may be inserted into a battery tray 236 inside the base 226 for the power supply of the LED.

As shown in FIG. 2, the back wall 125 of the sight mounting interface 110 leans backwards by an angle a, which may be, but is not limited to, 45° with reference to the normal vector of the planar mounting surface 130, and the front wall 135 leans backwards by an angle 0, which may be, but is not limited to, 45° with reference to the normal vector of the planar mounting surface 130. However, in other embodiments the back wall and the front wall may lean for example, but not limited to, about 30°-60°. The back wall and the front wall may lean by different number of degrees depending on the shape of a removable attachment element and the housing of the reflex sight.

Moreover, the back wall 125 may form two portions, a vertical portion 160 of the back wall extending upwardly from the planar mounting surface 130 to a leaning portion 165 of the back wall. The front wall 135 may form three portions, a first vertical portion 170 of the front wall extending upwardly from the planar mounting surface 130 to a leaning portion 175 of the front wall connecting a second vertical portion 180 of the front wall 135.

As illustrated in FIGs. 3-5, a rear face 240 and a front face 245 of the base 226 of the housing 205 are shaped to fit the corresponding attachment element, described later, and the back wall 125 or front wall 135 of the sight mounting interface 110, respectively. The rear face 240 leans forwards by an angel a, which may be, but is not limited to, 45° with reference to the normal vector of the bottom surface 230, i.e in a direction away from a viewer using the reflex sight 200. The front face 245 of the reflex sight 200 leans backwards, i.e in a direction against the viewer, by an angel 0, which may be, but is not limited to, 45° with reference to the normal vector of the bottom surface 230. However, in other embodiments the rear face 240 and the front face 245 may lean for example, but not limited to, about 30°-60°. The rear face 240 and the front face 245 may lean by different number of degrees depending on the shape of the attachment element and the housing of the reflex sight.

Moreover, the rear face 240 may form two portions, a vertical portion 250 extending upwardly from the bottom surface 230 to a leaning portion 255. The front face 245 may form three portions, a first vertical portion 260 extending upwardly from the bottom surface 230 to a leaning portion 265 connecting a second vertical portion 270 of the front face 245.

As illustrated in FIG. 4 the reflex sight 200 may be provided with a double button 275, having a “+” button and a button operatively connected to circuitry inside the housing 205 for adjustment of the intensity of the reticle generated by the battery powered LED.

A perspective view of the reflex sight 200 is shown in FIG. 5, wherein the longitudinal tenon 235 is proximally centered along the longitudinal direction of the bottom surface 230 of the housing 205. Although, the longitudinal tenon 235 extends along at least a portion of the bottom surface 230 in this embodiment, the longitudinal tenon 235 may advantageously extend along the whole or at least a main part of the length of the bottom surface 230. However, the longitudinal tenon 235 should not be longer than the groove 140 formed in the longitudinal mounting surface 130 of the sight mounting interface 110. Particularly, the longitudinal tenon 235 is sized, oriented and shaped to engage with the correspondingly sized, oriented and shaped groove 140. Hence, the length and height of the tenon 235 may closely match the length and depth of the groove 140 of the sight mounting surface 110. Thereby, a gap is created between the tenon 235 and a bottom 142 of the groove 140 when the reflex sight 200 is mounted to the sight mounting interface 110. In some embodiments, the height of the tenon 235 may be lower than the depth of the groove 140.

Advantageously, the tenon 235 may have longitudinal wall surfaces 280 leaning inwards by angles in a direction to the center of the bottom surface 230 as shown in FIG. 5. The groove 140 may have corresponding longitudinal inside surfaces 185 leaning inwards by angles in a direction to the center of the mounting surface 130, i.e a bottom of the groove 140, of the sight mounting interface 110, as shown in FIG. 1. The angles of the tenon 235 and the angles of the groove may be 20° in this embodiment. However, in other embodiments the angles of the tenon and the corresponding groove may be, but is not limited to, 15°- 35°. FIG. 6 illustrates an embodiment of a sight mounting system 300 for mounting a sight on a firearm. The sight may be, but is not limited to, the reflex sight 200, described in conjunction with FIGs. 3-5. In this embodiment, the sight mounting system 300 comprises the sight mounting interface 110 and an oblong dovetail member 305 or wedge forming the removable attachment element. The oblong dovetail member 305 has a planar upper surface 310 and planar lower surface 315 for facing the planar mounting surface 130 of the sight mounting interface 110. Further, the oblong dovetail member 305 has first and second long sides 320a and 320b leaning inwards from the upper surface 310 down to the lower surface 315, thereby forming a dovetail profile.

In this embodiment the first and second long sides 320a and 320b lean inwards by 45°. However, in other embodiments, the first and second long sides 320a and 320b may lean by other degrees, for example, but not limited to about 30°-60°.

The upper surface 310 of the oblong dovetail member may have at least two screw holes 325, which may be countersunk, for receiving screws 330.

When the sight mounting system 300 is assembled together, the reflex sight 200 is put on the sight mounting interface 110, wherein the longitudinal tenon 235 of the reflex sight 200 is aligned to fit the groove 140 of the sight mounting interface, and wherein at least a portion of the front face 245 of the reflex sight 200 engages at least a portion of the front wall 135 of the sight mounting interface 110. The leaning longitudinal wall surfaces 280 of the tenon 235 engage the corresponding longitudinal inside surfaces 185 of the groove 140.

Looking into FIG. 7, the reflex sight 200 is attached to the sight mounting interface 110 on the slide 100 by means of the two screws 330 disposed through the screw holes 325 through the oblong dovetail member 305 and threaded into the tapped holes 145 of the sight mounting interface 110. The first leaning long side 320a of the oblong dovetail member 305 is forced in close contact with the leaning back wall 125 of the sight mounting interface 110, and the second leaning long side 320b of the oblong dovetail member 305 is forced in close contact with the leaning rear face 240 of the reflex sight 200. Thereby, the reflex sight is forced downwards into the sight mounting interface 110 and forwards against the front wall 135. Advantageously, the leaning portion 265 of the front face 245 of the reflex sight 200 engages the leaning portion 175 of the front wall 135 of the sight mounting interface 110, thereby forming a small distance or gap 316 between the first vertical portion 260 of the reflex sight 200 and the first vertical portion 170 of the front wall 135. The gap 316 may be, but is not limited to, between 0 - 1 mm. In some embodiments the gap 316 may be 0.1 - 0.5 mm. Moreover, the planar lower surface 315 of the oblong dovetail member 305 should not become in contact with the mounting surface 130 of the sight mounting interface 110, the tenon 235 should not become in contact with the bottom of the groove 140, and the bottom surface 230 of the reflex sight 200 should not become in contact with the mounting surface 130 of the sight mounting interface 110. Hence, a small distance or gap 317 exists between the lower surface of the oblong dovetail member 315 and the mounting surface 130, and a small distance or gap 318 exists between the bottom surface 230 of the reflex sight 200 and the mounting surface 130, when the sight mounting system 300 is assembled. The gaps 317, 318 may be, but is not limited to, between 0 - 1 mm, for example 0.1 - 0.5 mm. In some embodiments, the gap 318 may be 0.01- 0.1 mm.

Thereby, the tenon 235 and groove form a joint preventing any lateral movement or rotation of the reflex sight 200 with respect to the sight mounting interface 110 as a result of repeated firing. Since the front face 245 of the reflex sight is forced against the front wall 135 of the sight mounting interface 110, a secure attachment of the reflex sight 200 to the sight mounting interface 110 is provided. This prevents any movement of the sight in relation to the sight mounting interface due to large forces caused by frequent firing.

Advantageously, differences in geometric tolerances in the different parts of the sight mounting system 300, including the reflex sight 200, sight mounting interface 110, and the screwed oblong dovetail member 305 may vary without any play occurring in the assembly.

In this embodiment of the reflex sight 200, the center of mass is located near the front of the sight. In order to reduce the load on the screws 330, the oblong dovetail member 305 is beneficially arranged at the rear face 240 of the reflex sight 200.

FIG. 8 illustrates the sight mounting system 300 including the reflex sight 200, which is arranged to be mounted on the sight mounting interface 110 of the slide 100. Moreover, the sight mounting system 300 comprises the oblong dovetail member 305. When the sight mounting system 300 is assembled, the reflex sight 200 is put on the sight mounting interface 110, wherein the longitudinal tenon 235 of the reflex sight 200 is aligned to fit the groove 140 of the sight mounting interface, wherein the front face 245 of the reflex sight 200 engages the front wall 135 of the sight mounting interface 110. Hence, the leaning longitudinal wall surfaces 280 of the tenon 235 engage with the corresponding longitudinal inside surfaces 185 of the groove 140. The reflex sight 200 is attached to the sight mounting interface 110 of the slide 100 by means of the two screws 330 disposed through the screw holes 325 through the oblong dovetail member 305 and threaded into the tapped holes 145 of the sight mounting interface 110. The first leaning long side 320a of the oblong dovetail member 305 is forced in close contact with the leaning back wall 125 of the sight mounting interface 110, and the second leaning long side 320b of the oblong dovetail member 305 is forced in close contact with the leaning rear face 240 of the reflex sight 200.

In this embodiment, the sight mounting interface 110 is provided with a groove 140 for receiving a corresponding tenon 235 of the reflex sight 200. However, in other embodiments, the sight mounting interface 110 may be provided with a tenon and the reflex sight may be provided with a corresponding groove of the reflex sight 200.

In some embodiments, the width of the base of the tenon 235 may be broader than the width of the opening into the groove 140. Hence, the height of the tenon 235 may even be lower than the depth of the groove 140, and still providing a gap 318 between the bottom surface 230 of the reflex sight 200 and the mounting surface 130, when the sight mounting system 300 is assembled.

In this embodiment, an auxiliary open sight may be provided, including a removable rear sight 190, for example an open iron sight including an oblong dovetail member provided with a sighting notch. The rear sight 190 may be slid into the rear sight receiver 150 on the slide 100, and a front sight 195 may be mounted on the front sight receiver 115. Thereby, the auxiliary open sight 190, 195 may be viewed through the reflex sight 200 by a shooter or marksman using the firearm provided with the slide 100. Advantageously, the auxiliary open sight may be used in case the reflex sight is turned off.

Looking into FIG. 9, the reflex sight 200 is attached to the sight mounting interface 110 on the slide 100 by means of the screwed oblong dovetail member 305. The removable rear sight 190, is arranged in the rear sight receiver 150 on the slide 120, and the front sight 195 is mounted on the front sight receiver 115.

FIG. 10 illustrates an embodiment of a sight mounting system 400 for a firearm. In this embodiment, the sight mounting system 400 comprises a sight 500, which is arranged to be mounted on a sight mounting interface 410 in a rear portion of a slide 405. The slide 405 is configured to be arranged on a firearm frame or receiver integrating other components forming a complete firearm, for example but not limited to, a handgun or a pistol. In this embodiment, the slide 405 may comprise a front sight receiver 415 arranged on a top surface 420 in a front portion of the slide 405 for receiving a front sight 416.

The sight mounting interface 410 comprises a back wall 425, a generally planar and longitudinal mounting surface 430, and a front wall 435. In this embodiment, the longitudinal mounting surface 430 is provided with a longitudinal tenon 440, which may be beneficially aligned with the slide and barrel of the firearm. Further, the sight mounting interface 410 has two tapped holes 445 provided on each side of the longitudinal surface in proximity to the front wall 435 of the sight mounting interface 410 in this embodiment.

In one embodiment, a rear sight receiver may be machined, preferably milled, as a slot between the front wall 435 of the sight receiver 410 and an ejection port 455 of the slide 405. The rear sight receiver may be a dovetail slot extending perpendicular to the longitudinal direction of the slide 405. In another embodiment, a rear sight receiver may be arranged as a slot in a portion of the slide 405 extending between the back wall 425 of the sight mounting interface 420 and a back end 426 of the slide 405. The rear sight receiver may be a dovetail slot extending perpendicular to the longitudinal direction of the slide 405.

The back wall 425 leans forwards in relation to the mounting surface 430, so as to fit a corresponding surface of a housing of the reflex sight 500 or an adapter plate, such as a mounting plate. The front wall 435 leans forwards in relation to the mounting surface 430, so as to fit the corresponding surface of the oblong dovetail member 305.

In this embodiment, the reflex sight 500 is a closed reflex sight comprising a housing 505 forming a rear frame 510 holding a protective rear glass 515, a front frame 520 holding a viewing lens 525, a base 526 with a bottom surface 530 provided with a groove 535 along the main part of the bottom surface 530. The groove 535 may extend along at least a part of, but preferably along the main part, of the bottom surface 530. Advantageously, the groove 535 is aligned with the slide and barrel of the firearm when the sight is mounted on the sight mounting interface 410.

A battery powered light source, such as, but not limited to, a red light-emitting diode (LED), is arranged in a light channel inside the housing 505 to project a beam of light through a path of the sight. The light beam is reflected by a reflective surface of the viewing lens 525 in a direction towards the protective rear glass 515. Hence, the optical elements of the reflex sight 500 is completely encased and thereby protected from any dirt, moisture, snow, and being damaged when used even in poor conditions.

As shown in FIG. 10, the back wall 425 of the sight mounting interface 410 leans forwards by, but is not limited to, 45° with reference to the normal vector of the planar mounting surface 430, and the front wall 435 leans forwards by, but is not limited to, 45° with reference to the normal vector of the planar mounting surface 430.

However, in other embodiments the back wall and the front wall may lean by other degrees, for example, but not limited to about 30°-60°.

The back wall 425 may form three portions, a first vertical portion of the back wall extending from the planar mounting surface 430 upwardly to a leaning portion of the back wall connecting a second vertical portion of the back wall 425. The front wall 435 may form two portions, a vertical portion of the front wall extending from the planar mounting surface 430 upwardly to a leaning portion of the front wall. The back wall and the front wall may lean by different number of degrees depending on the shape of the attachment element and the housing of the reflex sight.

In this embodiment, a rear face 540 and a front face 545 of a base 526 of the housing 505 are designed to fit the corresponding back wall 425 of the sight mounting interface 410 and an attachment element 305, respectively.

The rear face 540 leans forwards by 45°, i.e in a direction away from a viewer using the reflex sight 500, and the front face 545 of the reflex sight 500 leans backwards, i.e in a direction against the viewer, by 45°. However, in other embodiments the rear face 540 and the front face 545 may lean by other degrees, for example, but not limited to about 30°-60°. The rear face 540 and the front face 545 may lean by different number of degrees depending on the shape of the attachment element and the housing of the reflex sight. Moreover, the rear face 540 of the reflex sight 500 may form two portions, a vertical portion extending from the bottom surface 430 of the sight mounting interface 410 to a leaning portion. The front face 545 may form three portions, a first vertical portion extending from the bottom surface 430 to a leaning portion further to a second vertical portion of the front face 545.

The longitudinal tenon 440 along the bottom surface 430 should not be longer than the groove 535 in the longitudinal mounting surface 530 of the reflex sight 500. Particularly, the longitudinal tenon 440 is sized, oriented and shaped to engage with the correspondingly sized, oriented and shaped groove 535. Hence, the length and height of the tenon 440 may closely match the length and depth of the groove 535, thereby forming a gap between the tenon 440 and a bottom of the groove 535 when the sight mounting system 300 is assembled. In some embodiments, the height of the tenon 440 may be lower than the depth of the groove 535.

Advantageously, the tenon 440 may have longitudinal wall surfaces 480 leaning inwards in a direction to the center of the mounting surface 430 as shown in FIG. 10. The groove 535 may have corresponding longitudinal inside surfaces 536 leaning inwards in a direction to the center of the bottom surface 530 of the reflex sight 500. The angles of the tenon 440 and the angles of the groove 535 may be 20° in this embodiment. However, in other embodiments the angles of the tenon and the corresponding groove may be, but is not limited to, 15°- 35°.

In this embodiment, the sight mounting system 400 is assembled, wherein the reflex sight 500 is put on the sight mounting interface 410, wherein the longitudinal groove 535 of the reflex sight 500 is aligned to fit the longitudinal tenon 440 of the sight mounting interface, wherein at least a portion of the rear face 540 of the reflex sight 500 engages at least a portion of the back wall 425 of the sight mounting interface 410. Hence, the leaning longitudinal wall surfaces 480 of the tenon 440 engage with the corresponding longitudinal inside surfaces of the groove 535, thereby forming a joint preventing any lateral movement or rotation of the reflex sight 500 with respect to the sight mounting interface 410 as a result of repeated firing.

Moreover, the sight mounting system 400 comprises the oblong dovetail member 305 or wedge as described in conjunction with FIG. 6.

Looking into FIG. 11, the reflex sight 500 is attached to the sight mounting interface 410 on the slide 405 by means of the two screws 330 disposed through the screw holes 325, through the oblong dovetail member 305, and threaded into the tapped holes 445 of the sight mounting interface 410. In this embodiment, the first leaning long side 320a of the oblong dovetail member 305 is thereby forced in close contact with the leaning front face 545 of the reflex sight 500, and the second leaning long side 320b of the oblong dovetail member 305 is forced against the front wall 435 of the sight mounting interface 410. The rear face 540 of the reflex sight 500 is forced downwards into the sight mounting interface 410 an backwards against the back wall 425 of the sight mounting interface 410, thereby providing a secure attachment of the reflex sight 500 to the sight mounting interface 410 preventing any movement of the sight in relation to the sight mounting interface due to large forces caused by frequent firing.

Advantageously, the leaning portion of the rear face 540 of the reflex sight 500 engages the leaning portion of the back wall 425 of the sight mounting interface 410, thereby forming a small distance or gap between the vertical portion of the rear face 540 of the reflex sight 500 and the first vertical portion of the back wall 425. The gap may be, but is not limited to, between 0 - 1 mm, for example 0.1 - 0.5 mm. Moreover, the planar lower surface 315 of the oblong dovetail member 305 should not become in contact with the mounting surface 430 of the sight mounting interface 410, the tenon 440 of the sight mounting interface 410 should not become in contact with the bottom of the groove 535 of the reflex sight 500, and the bottom surface 530 of the reflex sight 200 should not become in contact with the mounting surface 430 of the sight mounting interface 410. Hence, a small distance or gap 347 exists between the lower surface of the oblong dovetail member 315 and the mounting surface 430, and a small distance or gap 348 exists between the bottom surface of the reflex sight 500 and the mounting surface 430, when the sight mounting system 400 is assembled together.

The gaps 347, 348 may be, but is not limited to, between 0 - 1 mm, for example 0.1 - 0.5 mm. In some embodiments, the gap 318 may be 0.01 - 0.1 mm.

Advantageously, differences in geometric tolerances in the different parts of the sight mounting system 400, including the reflex sight 500, sight mounting interface 410 and the screwed oblong dovetail member 305 may vary without any play occurring in the assembly.

In this embodiment, the sight mounting interface 410 is provided with a tenon 440 for engaging a corresponding groove 535 of the reflex sight 500. However, in other embodiments, the sight mounting interface 410 may be provided with a groove and the reflex sight may be provided a corresponding tenon.

FIG. 12 illustrates an alternative embodiment of an oblong dovetail member 605 or wedge forming a removable attachment element replacing the oblong dovetail member 605 of the sight mounting system 300, 400 for mounting a sight on a firearm as described above in conjunction with FIGs. 1-11. In this embodiment, an auxiliary open sight 606, for example an iron sight with a sighting notch, forms an integrated part of the oblong dovetail member 605. The oblong dovetail member 605 has a leaning upper surface 610 and planar lower surface 615 for facing the planar mounting surface 130, 430 of the sight mounting interface 110, 410. Further, the oblong dovetail member 605 has first and second long sides 620a and 620b leaning inwards from the upper surface 610 down to the lower surface 615, thereby forming a dovetail profile.

In this embodiment the first and second long sides 620a and 620b lean inwards by 45°. However, in other embodiments, the first and second long sides 620a and 620b may lean by other degrees, for example, but not limited to about 30°-60°. FIG. 13 illustrates an alternative embodiment of an oblong dovetail member 705 or wedge forming a removable attachment element replacing the oblong dovetail member 705 of the sight mounting system 300, 400 for mounting a sight on a firearm as described above in conjunction with FIGs. 1-11. In this embodiment the oblong dovetail member 705 is provided with an auxiliary open sight 706, for example a removable iron sight with a sighting notch, which is arranged in a sight receiver 707 on a protrusion 708. The oblong dovetail member 705 has a leaning upper surface 710 and planar lower surface 715 for facing the planar mounting surface 130, 430 of the sight mounting interface 110, 410. Further, the oblong dovetail member 705 has first and second long sides 720a and 720b leaning inwards from the upper surface 710 down to the lower surface 715, thereby forming a dovetail profile.

In this embodiment the first and second long sides 720a and 720b lean inwards by 45°. However, in other embodiments, the first and second long sides 720a and 720b may lean by other degrees, for example, but not limited to about 30°-60°.

The features and advantages of the invention are apparent from the detailed specification, and thus it is intended by the appended claims to cover all such features and advantages of the invention, which fall within the scope of the technology. The sight has been described with reference to a closed or “tube” reflex sight. In other embodiments the sight may be an open reflex sight, an open or closed solar inner red dot sight, a laser sight or any other aiming device for a firearm.

The embodiments of the sight mounting system have been described with reference to slide for a firearm, for example but not limited to, a handgun or a pistol, having a sight mounting interface for receiving a sight. Thereby, the sight can be mounted on the slide by means of the sight mounting interface. In other embodiments, the sight mounting interface may be arranged on another sight, such as a telescopic sight or fire control system being mounted on a firearm, lightweight artillery system or manportable launcher.

The embodiments of the sight have been described with reference to a sight having an integral base. In other embodiments, the base may be arranged as a separate component for mounting to a sight mounting interface 110, 410 according to the embodiments described herein. Hence, the base forming a separate component may have corresponding characterizing features as the base 226, 526 of the reflex sights 200, 500 as described herein. Additionally, the base may have a top surface arranged to be compatible with the bottom surface of other sights. In some embodiments, the separate base may be embodied as an adaptor plate 800 as illustrated in FIGs. 14 and 15. With reference to FIGs. 14 and 15, a rear face 840 and a front face 845 of a base 826 of the adaptor plate 800 are shaped to fit the corresponding attachment element 305, and the back wall 125 or front wall 135 of the sight mounting interface 110, respectively. The rear face 840 leans forwards by an angel a, which may be, but is not limited to, 45° with reference to the normal vector of a bottom surface 830, i.e in a direction away from a viewer using a reflex sight, which may be mounted on the adapter plate 800. The front face 845 of the adapter plate 800 leans backwards, i.e in a direction against the viewer, by an angel p, which may be, but is not limited to, 45° with reference to the normal vector of the bottom surface 830. However, in other embodiments the rear face 840 and the front face 845 may lean for example, but not limited to, about 30°-60°. The rear face 840 and the front face 845 may lean by different number of degrees depending on the shape of the attachment element and the housing of the reflex sight.

Moreover, the rear face 840 may form two portions, a vertical portion 850 extending upwardly from the bottom surface 830 to a leaning portion 855. The front face 845 may form two portions, a first vertical portion 860 extending upwardly from the bottom surface 830 to a leaning portion 865.

With reference to FIG. 15, a longitudinal tenon 835 is proximally centered along the longitudinal direction of the bottom surface 830 of the adapter plate 800. Although, the longitudinal tenon 835 extends along at least a portion of the bottom surface 830 in this embodiment, the longitudinal tenon 835 may advantageously extend along the whole or at least a main part of the length of the bottom surface 830. However, the longitudinal tenon 835 should not be longer than the groove 140 formed in the longitudinal mounting surface 130 of the sight mounting interface 110. Particularly, the longitudinal tenon 835 is sized, oriented and shaped to engage with the correspondingly sized, oriented and shaped groove 140. Hence, the length and height of the tenon 835 may closely match the length and depth of the groove 140 of the sight mounting surface 110. Thereby, a gap is created between the tenon 835 and a bottom 142 of the groove 140 when the adapter plate 840 is mounted to the sight mounting interface 110. In some embodiments, the height of the tenon 835 may be lower than the depth of the groove 140.

Advantageously, the tenon 835 may have longitudinal wall surfaces 880 leaning inwards by angles in a direction to the center of the bottom surface 830 as shown in FIG. 15 to fit into the groove 140 have corresponding longitudinal inside surfaces 185 leaning inwards by angles in a direction to the center of the mounting surface 130, i.e a bottom of the groove 140, of the sight mounting interface 110, as shown in FIG. 1. The angles of the tenon 835 and the angles of the groove may be 20° in this embodiment. However, in other embodiments the angles of the tenon and the corresponding groove may be, but is not limited to, 15°- 35°.

The adapter plate 800 has a top surface 855, which may be configured with one or more tabs 890 to engage a bottom surface of a sight, such as a reflex sight or laser sight or any other aiming device, which may be attached to the adapter plate 800. Moreover, the top surface 855 may have one or more hollow tapped bosses 895 aligned with corresponding holes through the reflex sight for receiving fasteners to secure the reflex sight to the adapter plate 800. The tabs and bosses may be arranged anywhere on the top surface 885 in order to engage different bottom surfaces of different sights.

Other configurations are possible within the scope of the present patent claims. However, although embodiments of the sight mounting system and the sight have been illustrated in the accompanying drawings and described in the foregoing detailed description, the disclosure is illustrative only, and changes, modifications and substitutions may be made without departing from the scope of the technology as set forth and defined by the following claims. Hence, it should be understood that the limitations of the described embodiments are merely for illustrative purpose and by no means limiting. Instead, the scope of the technology is defined by the appended claims rather than by the description, and all variations that fall within the range of the claims are intended to be embraced therein.

In addition, singular references do not exclude a plurality. The terms "a", "an", "first", "second" etc do not preclude a plurality. Reference signs in the claims are provided merely as a clarifying example and shall not be construed as limiting the scope of the claims in any way.

Claims

1. A sight mounting system (300; 400) for mounting a sight (200;

500) to a firearm, comprising: a sight mounting interface (110; 410) including a leaning back wall (125; 425), a planar longitudinal mounting surface (130; 430), and leaning front wall (135; 435) for receiving the sight (200; 500); an oblong dovetail member (305; 605; 705) having a planar upper surface (310), planar lower surface (315), a first long side (320a; 620a; 720a) and second long side (320b; 620b; 720b) both sides leaning inwards from the upper surface (310; 610; 710) down to the lower surface (315; 615; 715), the upper surface (310; 610; 710) having at least two screw holes (325; 625; 725) for receiving screws (330) through the oblong dovetail member (305; 605; 705) and threaded into tapped holes (145; 445) of the sight mounting interface (110; 410); wherein the oblong dovetail member (305; 605; 705)) is arranged to be forced in close contact with the leaning back wall (125) of the sight mounting interface (110) and a leaning rear face (240; 540) of the sight (200; 500), wherein at least a portion of the leaning front face (245; 545) of the sight (200; 500) is forced against at least a portion of the leaning front wall (135) of the sight mounting interface (110).

2. The sight mounting system (300; 400) according to claim 1, wherein the first long side (320a; 620a; 720a) and second long side (320b; 620b; 720b) of the oblong dovetail member (305; 605; 705) lean inwards by 30°-60°.

3. The sight mounting system (300; 400) according to claim 1, wherein the first long side (320a; 620a; 720a) and second long side (320b; 620a; 620b) of the oblong dovetail member (305; 605; 705) lean inwards by 45°.

4. The sight mounting system (300) according to any of the claims 1 to 3, wherein the sight mounting interface (110) is provided with a groove (140) extending along at least a part of the longitudinal mounting surface (130) and arranged to receive a longitudinal tenon (235) proximally centered along a longitudinal direction of a bottom surface (230) of the sight (200), wherein the length and depth of the groove (140) are arranged to closely match the length and height of the tenon (235), wherein longitudinal inside surfaces (185) of the groove (140) are arranged to engage with longitudinal wall surfaces (280) of the tenon (235).

5. The sight mounting system (300) according to claim 4, wherein the longitudinal inside surfaces (185) of the groove (140) lean inwards by angles in a direction to a bottom of the groove (140) forming the center of the mounting surface (130) of the sight mounting interface (110) for receiving the longitudinal wall surfaces (280) leaning inwards by angles in a direction to the center of the bottom surface (230) of the tenon (235).

6. The sight mounting system (300) according to claim 5, wherein the angles of the tenon (235) and the angles of the groove (140) are 15°- 35°.

7. The sight mounting system (300) according to claim 5, wherein the angles of the tenon (235) and the angles of the groove (140) are 20°.

8. The sight mounting system (300) according to any of the claims 1 to 7, wherein the back wall (125) leans backwards by an angle a with reference to a normal vector of the planar mounting surface (130), so as to fit the first long side (320a; 620a; 720a) of the oblong dovetail member (305; 605; 705), and the front wall (135) leans backwards by an angle P with reference to the normal vector of the planar mounting surface (130), so as to fit the front surface (245) of the sight (200;500).

9. The sight mounting system (300) according to claim 8, wherein a and are 30°-60°.

10. The sight mounting system (300) according to claim 8, wherein a and P are 45°.

11. The sight mounting system (300) according to any of the claims 8-10, wherein the back wall (125) comprises a vertical portion (160) extending from the planar mounting surface (130) to a leaning portion (165) of the back wall (125), and the front wall (135) comprises a first vertical portion (170) extending from the planar mounting surface (130) to a leaning portion (175) extending to a second vertical portion

12. The sight mounting system (300) according to claim 11, wherein a leaning portion (265) of the front face (245) of the reflex sight (200) engages the leaning portion (175) of the front wall (135) of the sight mounting interface (110), thereby forming a small gap (316) between a first vertical portion (260) of the front face (245) of the reflex sight (200) and the first vertical portion (170) of the front wall (135).

13. The sight mounting system (300) according to any of the claims 4-12, wherein a small gap (317) exists between the planar lower surface (315; 615; 715) of the oblong dovetail member (305; 605; 705) and the mounting surface (130) of the sight mounting interface (110), and a small gap (318) exists between the bottom surface (230) of the reflex sight (200) and the mounting surface (130), when the sight mounting system (300) is assembled.

14. A sight mounting system (300; 400) for mounting a sight (200;

500) to a firearm, comprising: a sight mounting interface (110; 410) having a leaning back wall (125; 425), a planar and longitudinal mounting surface (130; 430), and leaning front wall (135; 435) for receiving the sight (200; 500); an oblong dovetail member (305; 605; 705) having a planar upper surface (310; 610; 710), planar lower surface (315; 615; 715), a first long side (320a; 620a; 720a) and second long side (320b; 620b; 720b) both sides leaning inwards from the upper surface (310; 610; 710) down to the lower surface (315; 615; 715), the upper surface (310; 610; 710) having at least two screw holes (325; 625; 725) for receiving screws (330) through the oblong dovetail member (305; 605; 705) and threaded into tapped holes (145; 445) of the sight mounting interface (110; 410); wherein the oblong dovetail member (305; 605; 705) is arranged to be forced in close contact with the leaning front wall (435) of the sight mounting interface (410) and the leaning front face (245; 545) of the sight (200; 500), wherein at least a portion of the leaning rear face (240; 540) of the reflex sight (200; 500) is forced against at least a portion of the leaning back wall (425) of the sight mounting interface (410). 15. The sight mounting system (300; 400) according to claim 14, wherein the first long side (320a; 620a; 720a) and second long side (320b; 620b; 720b) of the oblong dovetail member (305; 605; 705) lean inwards by 30°-60°.

16. The sight mounting system (300; 400) according to claim 14, wherein the first long side (320a; 620a; 720a) and second long side (320b; 620b; 720b) of the oblong dovetail member (305; 605; 705) lean inwards by 45°.

17. The sight mounting system (400) according to any of the claims

14 to 16, wherein the sight mounting interface (410) is provided with a longitudinal tenon (440) extending along at least a part of the longitudinal mounting surface (430) arranged to engage with a corresponding longitudinal groove (535) proximally centered along a longitudinal direction of a bottom surface (530) of the sight (500), wherein the length and depth of the tenon (440) is arranged to closely match the length and height of the groove (535), wherein longitudinal wall surfaces (480) of the tenon (435) are arranged to engage with longitudinal inside surfaces (536) of the groove (535).

18. The sight mounting system (400) according to claim 17, wherein the longitudinal wall surfaces (480) leaning inwards by angles in a direction to the center of the bottom surface (430) of the tenon (440) for engaging with the longitudinal inside surfaces (536) of the groove (535) leaning inwards by an angle in a direction to the center of a bottom surface (530) of the sight (500).

19. The sight mounting system (400) according to claim 18, wherein the angles of the tenon (440) and the angles of the groove (535) are 15°- 35°.

20. The sight mounting system (400) according to claim 18, wherein the angles of the tenon (440) and the angles of the groove (535) are 20°.

21. The sight mounting system (400) according to any of the claims 14 to 20, wherein the back wall (425) leans forwards by an angle a in relation to a normal vector of the mounting surface (430), so as to fit the rear surface (240;540) of the sight (200;500), and the front wall (435) leans forwards by an angle P with reference to the normal vector if the planar mounting surface (430), so as to fit the second long side (320b) of the oblong dovetail member (305). 22. The sight mounting system (400) according to claim 21, wherein a and 0 are 30°-60°.

23. The sight mounting system (400) according to claim 21, wherein a and 0 are 45°.

24. The sight mounting system (400) according to any of the claims 21- 23, wherein the back wall (425) comprises a first vertical portion of the back wall extending from the planar mounting surface (430) to a leaning portion connecting a second vertical portion of the back wall (425), and the front wall (435) comprises a vertical portion of the front wall extending from the planar mounting surface (430) to a leaning portion of the front wall (435).

25. The sight mounting system (400) according to claim 24, wherein a leaning portion of the rear face (540) of the reflex sight (500) engages a leaning portion of the back wall (425) of the sight mounting interface (410), thereby forming a small gap between a first vertical portion of the rear face (540) of the reflex sight (500) and a first vertical portion of the back wall (425).

26. The sight mounting system (400) according to any of the claims 17-25, wherein a small gap (347) exists between the planar lower surface (315) of the oblong dovetail member (305) and the mounting surface (430), and a small gap (348) exists between the bottom surface (530) of the reflex sight (500) and the mounting surface (430), when the sight mounting system (300) is assembled.

27. The sight mounting system (300; 400) according to any of the claims 1-

26, wherein the sight mounting interface (110; 410) is arranged on a slide (100) for a firearm, or on a another sight to be mounted on a firearm, lightweight artillery system or man-portable launcher.

28. The sight mounting system (300; 400) according to any of the claims 1-

27, wherein the oblong dovetail member (305; 605; 705) is provided with an auxiliary open sight (606; 706), which forms an integrated part of the oblong dovetail member (605); or a removable part, which is arranged in a sight receiver (707) on a protrusion (708) of the oblong dovetail member (705).

29. A sight (200) for mounting to a sight mounting interface

(110), the sight comprising a housing (205) having a base (226) comprising a rear face (240), a front face (245), and a bottom surface (230) provided with a longitudinal tenon (235), wherein the longitudinal tenon (235) has longitudinal wall surfaces (280) leaning inwards by angles in a direction to the center of the bottom surface (230) for engaging corresponding leaning longitudinal inside surfaces (185) of a groove (140) of the sight mounting interface (110), the front face (245) leans backwards to engage a front wall (135) of said sight mounting interface (110), and the rear face (240) leans forwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the sight (200) to the sight mounting interface (110).

30. A sight (500) for mounting to a sight mounting interface, the sight comprising a housing (505) having a base (526) comprising a rear face (540), a front face (545), and a bottom surface (530) provided with a longitudinal groove (535), wherein the longitudinal groove (535) has longitudinal inside surfaces (536) leaning inwards by angles in a direction to the center of the bottom surface (530) for engaging corresponding leaning longitudinal wall surfaces of a tenon of the sight mounting interface (410), the front face (545) leans backwards to engage a front wall of said sight mounting interface, and the rear face (540) leans forwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the sight (500) to the sight mounting interface.

31. A sight (500) for mounting to a sight mounting interface, the sight comprising a housing (505) having a base (526) comprising a rear face (540), a front face (545), and a bottom surface (530) provided with a longitudinal groove (535), wherein the longitudinal groove (535) has longitudinal inside surfaces (536) leaning inwards by angles in a direction to the center of the bottom surface (530) for engaging corresponding leaning longitudinal wall surfaces (448) of a tenon (440) of the sight mounting interface (410), the rear face (540) leans forwards to engage a back wall

engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the sight (500) to the sight mounting interface (410).

32. A sight (200) for mounting to a sight mounting interface, the sight comprising a housing (205) having a base (226) comprising a rear face (240), a front face (245), and a bottom surface (230) provided with a longitudinal tenon (235), wherein the longitudinal tenon (235) has longitudinal wall surfaces (280) leaning inwards by angles in a direction to the center of the bottom surface (230) for engaging corresponding leaning longitudinal inside surfaces of a groove of the sight mounting interface, the rear face (240) leans forwards to engage a back wall of said sight mounting interface, and the front face (245) leans backwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the sight (200) to the sight mounting interface.

33. The sight (200; 500) according to any of the claims 29 to 32, wherein the angles of the tenon (235; 440) and the angles of the groove ( 140;535) are 15-35°.

34. The sight (200; 500) according to claim 29 to 32, wherein the angles of the tenon (235; 440) and the angles of the groove (140; 535) are 20°.

35. The sight (200; 500) according to any of the claims 29 to 34, wherein the rear face (240; 540) leans forwards by 30°-60°, with reference to the normal vector of the bottom surface (230; 530), and the front face (245; 545) leans backwards by 30°-60°with reference to the normal vector of the bottom surface (230; 530).

36. The sight (200; 500) according to any of the claims 29 to 34, wherein the rear face (240; 540) leans forwards by 45°, with reference to the normal vector of the bottom surface (230; 530), and the front face (245; 545) leans backwards by 45° with reference to the normal vector of the bottom surface (230; 530).

37. The sight (200; 500) according to any of the claims 29 to 36, wherein the rear face (240; 540) of the sight (200; 500) forms at least two portions including a vertical portion (250) extending upwardly from the bottom surface (230) to a leaning portion (255). 38. The sight (200; 500) according to any of the claims 29 to 37, wherein the front face (245; 545) of the sight forms at least three portions including a first vertical portion (260) extending upwardly from the bottom surface (230) to a leaning portion (265) further to a second vertical portion (270).

39. The sight (200; 500) according to any of the claims 29 to 38, wherein the sight (200; 500) is a closed reflex sight having optical elements completely encased by the housing (205; 505).

40. An adapter plate for mounting a sight to a sight mounting interface (110), the adapter plate comprising a base (226) having a rear face (240), a front face (245), a top surface for attachment to the sight, and a bottom surface (230) provided with a longitudinal tenon (235), wherein the longitudinal tenon (235) has longitudinal wall surfaces (280) leaning inwards by angles in a direction to the center of the bottom surface (230) for engaging corresponding leaning longitudinal inside surfaces (185) of a groove (140) of the sight mounting interface (110), the front face (245) leans backwards to engage a front wall (135) of said sight mounting interface (110), and the rear face (240) leans forwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the adapter plate to the sight mounting interface (110).

41. An adapter plate for mounting a sight to a sight mounting interface, the adapter plate comprising a base (226) having a rear face (240), a front face (245), a top surface, and a bottom surface (230) provided with a longitudinal tenon (235), wherein the longitudinal tenon (235) has longitudinal wall surfaces (280) leaning inwards by angles in a direction to the center of the bottom surface (230) for engaging corresponding leaning longitudinal inside surfaces of a groove of the sight mounting interface, the rear face (240) leans forwards to engage a back wall of said sight mounting interface, and the front face (245) leans backwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the adapter plate to the sight mounting interface. 42. An adapter plater for mounting a sight to a sight mounting interface, the adapter plate comprising a base (526) having a rear face (540), a front face (545), a top surface for attachment to the sight, and a bottom surface (530) provided with a longitudinal groove (535), wherein the longitudinal groove (535) has longitudinal inside surfaces (536) leaning inwards by angles in a direction to the center of the bottom surface (530) for engaging corresponding leaning longitudinal wall surfaces of a tenon of the sight mounting interface (410), the front face (545) leans backwards to engage a front wall of said sight mounting interface, and the rear face (540) leans forwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the adapter plate (500) to the sight mounting interface.

43. An adapter plate for mounting a sight to a sight mounting interface, the adapter plate comprising a base (526) having a rear face (540), a front face (545), a top surface, and a bottom surface (530) provided with a longitudinal groove (535), wherein the longitudinal groove (535) has longitudinal inside surfaces (536) leaning inwards by angles in a direction to the center of the bottom surface (530) for engaging corresponding leaning longitudinal wall surfaces (480) of a tenon (440) of the sight mounting interface (410), the rear face (540) leans forwards to engage a back wall (425) of said sight mounting interface (410), and the front face (545) leans backwards to engage an oblong dovetail member (305; 605; 705) forming a removable attachment element for securing the adapter plate to the sight mounting interface (410).