WO2024022545A1

WO2024022545A1 - Kit for attaching accessories to a weapon

Info

Publication number: WO2024022545A1
Application number: PCT/CZ2022/050067
Authority: WO
Inventors: Jan Čontoš
Original assignee: FUSE Weapon Systems, s.r.o.
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2024-02-01
Also published as: CZ36421U1

Abstract

The object of the invention is a kit for attaching accessories to a weapon, in particular a Sa vz. 61 submachine gun, the weapon comprising an extended barrel ring and a stock (5) attaching groove extending perpendicular to the barrel axis. This kit comprises a barrel sleeve (1 ) adapted to be put on the barrel, preferably designed to be attached to said ring. Furthermore, the kit comprises a stock base (2) comprising a projection (3) for sliding into the stock (5) attaching groove and an upper piece (4) for attaching accessories, wherein the upper piece (4) can be attached to the barrel sleeve (1 ) and to the stock base (2). The upper piece (4) is preferably put on the barrel sleeve (1 ) and/or the stock base (2) by means of a dovetail groove and preferably further comprises a recess (11 ) for housing the weapon sights.

Description

Kit for attaching accessories to a weapon

Technical Field

The present invention relates to a modernization kit that can be mounted on a weapon, such as a submachine gun, in particular the Submachine gun model 1961 or weapons derived therefrom, without interfering with the design of the weapon, and thus adapt the weapon for attaching accessories, in particular a sight.

Background of the invention

Self-loading and automatic variants of the Submachine gun model 1961 Skorpion have been on the market almost unchanged for about 60 years. During that time, the demands on a weapon in this category have changed for professionals as well as sport and hobby shooters. The main requirement of the modern age is the possibility of fitting sighting systems, a secondary requirement is the possibility of fitting a flashlight and other accessories.

In the current state of the art, there are known kits for fitting submachine guns with rails, for attaching accessories. Such a solution is described, for example, in the document KR10-2254233. In this solution, the individual rails are screwed to the frame of the submachine gun. A disadvantage of this solution is that the attachment of the rail requires either the submachine gun to be adapted to the attachment during production, which for example the Sa vz. 61 is not, or requires intervention in the design of the weapon. Such an intervention is irreversible and may require a licensed professional, which makes it considerably more difficult and expensive to modernize a given submachine gun and, for many users, represents unacceptable damage to the weapon. It would therefore be advisable to come up with a solution that would allow to adapt the weapon, especially the Sa vz. 61 submachine gun or weapons derived therefrom, for the attachment of modern accessories and that would not require irreversible intervention in the weapon’s design, and preferably not even the use of special tools during assembly.

Summary of the Invention

The shortcomings of the solutions known in the state of the art are to a certain extent eliminated by a kit for attaching accessories to a weapon, the weapon comprising an extended ring on the barrel and a stock attaching groove extending perpendicular to the axis of the barrel. Such a weapon is in particular the Skorpion submachine gun or weapons derived therefrom. However, the kit can also be used with other types of submachine guns or other weapons that have a similar design and thus allow the kit to be mounted. The kit comprises a barrel sleeve adapted to be put on the barrel. After being put on, the sleeve can be locked, for example by tightening a screw, wherein it clamps the barrel and/or the frame of the weapon. Further, the kit comprises a stock base comprising a projection for sliding into the stock attaching groove, i.e., the base is attached similarly to the original stock, and an upper piece, called a rail, for attaching accessories, wherein the upper piece is attachable to the barrel sleeve and to the stock base. The stock base can be preferably attached to the weapon independently of the grip. In particular, the grip can be attached to the frame of the weapon behind the trigger from below and the stock base can be attached to it from behind. Both of these parts are thus preferably removable independently of each other, such that the stock grip does not need to be modified or removed while the kit is being assembled.

The upper piece does not need to be attached directly to the frame. Since the Skorpion submachine guns are not standardly adapted for the attachment of rails or accessories, the need to intervene in the design of the weapon when attaching the rail is thus eliminated. At the same time, the upper piece is securely fixed at both ends, such that, for example, the sight on the upper piece is secured against unwanted movement and is attached in a precise position. In principle, the kit of the invention will thus make it possible to significantly modernize older types of weapons without the need for any irreversible modification of the weapon. To assemble the kit, for example only a screwdriver or a retractable screwdriver are required, so no special tools or professional skills are required. Both the sleeve and the stock base are removably attachable to the weapon to allow for easy and quick assembly and disassembly.

Preferably, the kit further comprises a stock rotatably attached to the stock base. The rotary stock ensures stability when shooting without the stock getting in the way when carrying the gun. Preferably, the rotary connection comprises a safety against spontaneous rotation.

Preferably, the kit further comprises a forend attachable to the barrel sleeve and adapted for attaching accessories. This makes it possible to attach additional accessories to the weapon. The forend can be screwed to the sleeve, for example. It is also possible to make the forend from one piece with a sleeve, i.e., basically to provide the sleeve with rails or elements for attaching accessories. At the same time, the upper piece can be attached to the forend to ensure stability of all kit components.

Preferably the upper piece comprises on its bottom side a groove of the upper piece and the barrel sleeve and/or the stock base, preferably both the sleeve and the stock base, comprise on its upper side a projection for the upper piece extending upwards, wherein both projections for the upper piece can be attached in the groove of the upper piece. After fixing the barrel sleeve and stock base to the weapon, it is thus possible to slide the upper piece through the groove of the upper piece onto the projections for the upper piece and thus attach the upper piece in the exact position. Subsequently, the upper piece can be secured against displacement by the groove on the projection, e.g., by screws. It is also possible to implement the projection for the upper piece with a constant width, i.e., such that it does not expand. Locking with, for example, a screw or a pin can then serve not only to prevent displacement along the barrel but also to prevent the groove of the upper piece from being dislodged from the projections in a direction perpendicular to the barrel axis.

Preferably, the groove of the upper piece is a dovetail groove and both projections for the upper piece have a shape complementary to the shape of the dovetail groove of the upper piece. The dovetail groove is relatively easy to produce and locks the components to be connected in multiple directions, making the use thereof in the kit particularly preferable. Instead of the groove on the upper piece and the projections on the sleeve and base, it is also possible to provide, by analogy, grooves on the sleeve and base and a projection or projections on the upper piece, whether these are dovetail elements or otherwise shaped elements.

The stock attaching groove is preferably a dovetail groove. As mentioned above, the dovetail groove provides a relatively strong and easy to implement connection. On the Skorpion submachine guns, it is common to attach the stock with a dovetail groove and it is particularly practical to use the original stock fixture to attach the base.

The stock base may comprise a through opening for a fastener for locking in the stock attaching groove. Standard stocks can be secured against sliding in the dovetail groove by a spring-loaded pin placed in this opening for the fastener that fits into the opening in the groove on the weapon when the stock is slid into place. Instead of the spring-loaded pin, it is possible to use, for example, a screw that is screwed through the base into the opening in the weapon after the base is slid into place. The kit can be provided with threaded metal inserts to attach the screws in the individual pieces of the kit.

Preferably, the upper piece comprises on its bottom side a recess for housing the weapon sights. The sights are usually relatively low-strength, so they cannot be used for fixing the upper piece. It is thus preferable to provide a recess in the upper piece for the sights so that they do not have to be removed and do not complicate the assembly of the kit. This space can define a clearance around the sights for easier putting on of the upper piece. For example, it may be a groove extending along the length across the entire upper piece on its bottom side.

The barrel sleeve can be adapted to be attached to the barrel ring. This ring provides a stable attachment and mounting the sleeve thereto is relatively easy. The barrel sleeve may also, alternatively or additionally, be adapted to be attached to the part of the frame of the weapon from which the barrel extends. The sleeve is preferably after assembly supported by a ring at the front and by this front end of the weapon frame at the rear.

The object of this invention is also a weapon, in particular the Sa vz. 61 submachine gun or a weapon derived therefrom, wherein the weapon comprises an extended barrel ring and a stock attaching groove extending perpendicular to the barrel axis. Further, this weapon is provided with a kit according to the present invention. Description of Drawings

A summary of the invention is further clarified using exemplary embodiments thereof, which are described with reference to the accompanying drawings, in which: fig. 1 schematically shows in a perspective view a barrel sleeve from the kit of the present invention, fig. 2 schematically shows a perspective view of a stock base from the kit of the present invention, fig. 3 schematically shows a perspective view of the stock fixture from the kit, fig. 4 schematically shows a perspective view of the stock button used for folding the stock, fig. 5 is a perspective view of the upper piece from the kit of the invention, fig. 6 is a perspective view of the stock, fig. 7 is a perspective view of one embodiment of the forend, fig. 8 is a perspective view of another embodiment of the forend, fig. 9 is a perspective view of an assembled kit of the present invention, and fig. 10 is a view of the kit from fig. 9 with the stock folded, fig. 11 is a view of an alternative barrel socket in an embodiment of two parts, fig. 12 is a rear and side view of an alternative embodiment of the stock base, wherein a pair of openings can be seen extending from the top into the projection for the upper piece, which are used to fix the upper piece, fig. 13 is a view of the upper piece from below, wherein recesses are visible, for example for housing sights during assembly, and fig. M is a perspective view of the stock base with the stock fixture attached and with the stock. Exemplary Embodiments of the Invention

The invention will be further clarified using exemplary embodiments with reference to the respective drawings. The object of the invention is a kit for attaching accessories to a weapon, which comprises an extended barrel ring and a stock attaching groove extending perpendicular to the barrel axis and located at the rear end of the frame. The barrel ring is primarily designed for attaching a silencer. Such a weapon is in particular the Submachine gun model 1961 or Skorpion, or other weapons derived therefrom.

This kit comprises at least an upper piece 4, the so-called rail, which is used for attaching a sight or other or different elements. These elements can be attached to the upper piece for example by screws. An example of the upper piece 4 is shown in fig. 5. In order to allow the upper piece 4 to be easily attached to the weapon, without the need for any irreversible modification of the weapon, it is attached at the front by means of the barrel sleeve 1 (see figs. 1 and 1 1 ) and at the rear by means of the stock base 2 (see figs. 2 and 12). The sleeve is adapted to be put on the barrel and clamp it, or to clamp the weapon at the front end of the frame, where the frame meets the barrel. Preferably, the barrel sleeve 1 is secured to the barrel ring, i.e., part of the barrel with an extended diameter, which originally serves as an attachment point for e.g., a silencer. For example, the barrel sleeve 1 is slid over the ring and locked behind it, for example by tightening the screws, such that it is ensured that the sleeve does not fall off the barrel. On the rear side, the barrel sleeve 1 can be supported by the frame of the weapon such that it is also secured against rearward movement. Fig. 1 shows a one-piece barrel sleeve 1 that expands when put on the barrel, for example it may be made of plastic. Fig. 1 1 shows a barrel sleeve made of two pieces, after being put on the barrel, e.g., connected by screws. This sleeve may be more preferable when creating a kit from a less flexible material such as metal, particularly aluminum alloy. The stock base 2 is attached to the frame of the weapon by an element originally intended for attaching the stock 5, by a groove for sliding in a horizontal direction perpendicular to the barrel axis. The base then comprises a projection 3 for sliding into the stock attaching groove. The attachment of the upper piece 4 can then be implemented, for example, by means of shaped elements and/or fixed connections, e.g., screws (see openings in fig. 12). The stock base 2 is preferably attached into the dovetail groove of the weapon. The dovetail groove is typical for attaching the stock on Sa vz. 61 submachine guns and allows the base, or the stock 5 itself, to be easily slid in and locked in all directions except the direction of sliding. In this direction, preferably the stock base 2 is then locked by a fastener, such as a screw, pin, spring pin, etc., which fits into an opening provided in the groove on the weapon. The stock base 2 therefore has a dovetail projection, complementary to the dovetail groove, see fig. 2. A dovetail groove can be essentially any groove that has a bottom and two opposite side walls, wherein the side walls converge toward each other from the bottom. For example, it may have a trapezoidal cross-section, or it may be a T-groove. The fastener can be part of the stock base 2, if it is, for example, a spring-loaded pin that is pressed into the opening in the weapon by a spring after the base is slid into the correct position. If the fastener is a screw, it can be screwed through the entire stock base 2 after the base is slid in the place. The dovetail groove can extend horizontally (in standard weapon position) and perpendicular to the barrel axis, so the base is slid in from the side.

The kit can also include a stock 5. Preferably, the stock 5 is rotary, such that it can be folded (cf. figs. 9 and 10) for easier carrying of the weapon provided with the kit. However, it is also possible to use a fixed stock 5. The rotary connection may be implemented by means of a stock fixture 9, for example as shown in fig. 3. The axis of rotation is vertical when the weapon is in normal position. The stock fixture 9 is connected to the stock base 2 by a hinge and is firmly connected, e.g., by a screw connection, to the stock 5. The stock 5 is shown by way of example in fig. 6. A safety with a stock release button 10 is used to secure against spontaneous rotation, especially in the unfolded state when the weapon is to be used, but preferably also in the folded state. The locking of the safety may be automatic, for example by means of a spring which, when the stock 5 is unfolded or even folded, moves the safety or part thereof so as to prevent the stock 5 from rotating. The stock button 10 is shown in an exemplary embodiment in fig. 4 and is rotatably attached to the stock fixture 9. Its front part fits into the opening in the stock base 2, thus providing a rotary connection. By pressing the stock button 10, this fitting part is pushed away from the base and thus rotation is enabled. In this embodiment, the button is only used for locking in the unfolded position. The stock base 2 connected to the stock fixture 9 and to the stock 5 is shown in fig. 14. Preferably, the kit also includes a forend 6, which is adapted for attachment of accessories, such as a flashlight or camera, to the front part of the weapon, especially under the barrel or on the side of the barrel. Two exemplary embodiments of the forend 6 are shown in figs. 7 and 8. In the first of these embodiments, the forend 6 comprises four dovetail projections - at the top, bottom, and both sides. The upper projection is the projection 8 for the upper piece 4, i.e., the upper piece 4 is slid on it. The other projections are additional rails for various accessories or can be used for attaching fixtures for other accessories. In the second of these embodiments, the accessories are attached in the grooves. The forend 6 may, for example, be screwed to the barrel sleeve 1 - in the embodiments shown it comprises four through openings for screws. Threaded metal inserts may be provided in the barrel sleeve 1 and in the forend 6 to enable reliable screwing.

The upper piece 4 may be attached to the barrel sleeve 1, the stock base 2, and optionally to the forend 6 by any fixed, preferably removable, connection. In the preferred embodiment shown, the upper piece 4 is provided with a dovetail groove 7 of the upper piece 4 (see fig. 9) on its bottom side, and via this groove it is slid onto the projections 8 for the upper piece on the upper side of the other components. The upper piece 4 is thus secured against movement in all directions except parallel to the barrel axis, in which direction it is secured after sliding by, for example, screws. On the bottom side of the upper piece 4, recesses 1 1 are preferably provided for the weapon sights (see fig. 13) or for other possible projecting elements on the upper side of the weapon frame. These recesses H, such as longitudinal grooves, allow the upper piece 4 to be slid on without the sights interfering or having to be removed.

Alternatively, the stock base 2 can be secured against movement in the direction of the sliding of the projection for sliding into the stock 5 attaching groove by, for example, a pair of side elements that are attached to the base after sliding and overlap it such that they rest against the frame of the weapon and thus prevent the stock base 2 from moving in the dovetail groove of the weapon.

The kit of the technical invention may be made, for example, by 3D printing, for example from ASA or ABS. It is also possible to produce the kit or parts thereof by injection molding or machining. In terms of mechanical properties, it is particularly preferable to produce the kit from aluminum or an aluminum alloy such as duralumin. For a metal kit, the threads for the screw connections can be formed directly in the metal material, so there is no need to provide brass threaded inserts.

List of Reference Signs

1 - barrel sleeve

2 - stock base

3 - projection for sliding into the stock attaching groove

4 - upper piece

5 - stock

6 - forend

7 - groove of the upper piece

8 - projection for the upper piece

9 - stock fixture

10 - stock button

11 - recess

Claims

1 . A kit for attaching accessories to a weapon, the weapon comprising an extended barrel ring and a stock-attaching groove extending perpendicular to the barrel axis, characterized in that the kit comprises a barrel sleeve (1 ) adapted to be put on the barrel, a stock base (2) comprising a projection (3) for sliding into the stockattaching groove, and an upper piece (4) for attaching accessories, wherein the upper piece (4) can be attached to the barrel sleeve (1 ) and to the stock base (2).

2. The kit for attaching accessories to a weapon of claim 1 , characterized in that it further comprises a stock (5) rotatably attached to the stock base (2).

3. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that it further comprises a forend (6) attachable to the barrel sleeve (1 ) and adapted for attachment of accessories.

4. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the upper piece (4) comprises on its bottom side a groove (7) of the upper piece and the barrel sleeve (1 ) and/or the stock base (2) comprise on their upper side a projection (8) for the upper piece extending upwards, wherein both projections (8) for the upper piece can be attached in the groove (7) of the upper piece.

5. The kit for attaching accessories to a weapon of claim 4, characterized in that the groove (7) of the upper piece is a dovetail groove and the two projections (8) for the upper piece have a shape complementary to the shape of the dovetail groove (7) of the upper piece.

6. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the stock-attaching groove is a dovetail groove.

7. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the stock base (2) comprises a through opening for a fastener for securing in the stock-attaching groove. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the upper piece (4) comprises a recess (11 ) on its bottom side for housing the weapon sights. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the barrel sleeve (1 ) is adapted to be attached to the barrel ring. The kit for attaching accessories to a weapon of any one of the preceding claims, characterized in that the barrel sleeve (1 ) is adapted to be attached to a part of the frame of the weapon from which the barrel projects.