WO2013010515A1 - Arrangement to fasten the rail lower handguard on a long gun - Google Patents
Arrangement to fasten the rail lower handguard on a long gun Download PDFInfo
- Publication number
- WO2013010515A1 WO2013010515A1 PCT/CZ2012/000062 CZ2012000062W WO2013010515A1 WO 2013010515 A1 WO2013010515 A1 WO 2013010515A1 CZ 2012000062 W CZ2012000062 W CZ 2012000062W WO 2013010515 A1 WO2013010515 A1 WO 2013010515A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- locking element
- rail lower
- arrangement
- lower handguard
- handguard
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
- F41C23/00—Butts; Butt plates; Stocks
- F41C23/16—Forestocks; Handgrips; Hand guards
Definitions
- the invention concerns the arrangement to fasten the rail lower handguard on a long gun, namely without using tools.
- the arrangement to fasten the rail lower handguard on a long gun consists of a rail lower handguard, a barrel nut and a case of the bolt assembly carrier.
- the rail lower handguard is created by a one-part hollow longitudinal profile shaped as a hollow cross in the cross- section, whereas in each of the profile arms there is a longitudinal groove inside, namely un upper groove, then two side grooves angular in the section and a lower groove, whereas all four grooves are joined in one hollow through a round opening.
- the rail lower handguard has a safety mechanism against a mutual rotation of the rail lower handguard and the barrel nut that contains a clamp arrangement of the rail lower handguard on the barrel nut.
- clamp arrangement contains a longitudinal through cutout created in the rear part of the rail lower handguard in the lower wall of the profile cross arm aiming downwards.
- the pin of the locking element has in its middle part a longitudinal radius cutout, the depth and radius of which correspond to the recess, which is modified in the barrel nut, whereas the diameter of the pin of the locking element matches the width appropriately, or the depth and diameter of the recess in the barrel nut.
- Another advantageous solution consists in the fact that between the lever of the locking element and the corresponding wall of the lower cross profile arm and lever of the locking element on the pin of the locking element the washer of the locking element is modified, which has an outer flat surface upright to the pin axis of the locking element, which enables the lever of the locking element to turn .
- Another advantageous solution consists in the fact that the nut of the locking element and/or the washer of the locking element is shaped inside complementar.ily to the outer cutout of the wall . of the lower cross profile arm to prevent spinning.
- piston rod case is modified in the front upper part of case of the bolt assembly carrier, whereas the piston rod case and the upper groove of the rail lower handguard are matched together in the shape and dimensions to common tight form mating.
- Another advantageous solution consists in. the fact that there are advantageously oval cutouts laid out between these standard profiles, especially to make the gun lighter and to improve its cooling.
- the solution proposed enables to fasten the rail lower handguard by anybody who is competent to hold, carry and use the gun wherever he/she is just now without any tools needed .
- Fig. 1 the rail lower handguard in itself and arrangement to fasten
- Fig. 2 the arrangement of the barrel nut with the lever of the barrel nut
- Fig. 3 the lock of the barrel nut against a self-release
- Fig. 4 the modification of the gunlock pusher slope.
- the purpose of the rail lower handguard 1, represented on the Fig. 1, is to keep the long gun in a front hand, namely in the left hand as well as in the right one, in dependence on the fact if the shooting person is a right- handed person or a left-handed person.
- the rail lower handguard 1 does not lean against the barrel 17, but it is modified towards it with a play. It means that the rail lower handguard 1 does not lean against the barrel 17 and assures its free vibrations while shooting and so it assures a better concourse of shots or equability of the gun shot. This modification is called a "floating barrel".
- this rail lower handguard 1 can be fitted as necessary e.g. with a bipod, a supplementary handle, a laser gun sight or a tactical light.
- the rail lower handguard 1 is created by a one-part hollow longitudinal profile shaped as a hollow cross in the cross-section.
- each of the profile arms there is groove 18, 27 created inside.
- the upper groove 27 of a half-round cross-section two side grooves 18 of an angular cross-section and a lower groove of an angular cross-section. All four grooves 18, 27 are joined in one hollow through a round opening. The diameter of this opening is sized so that the rail lower handguard 1 can be put on over the barrel nut 15 described below.
- the pin 3 of the locking element is assigned to the rail lower handguard 1, and its diameter comes up to the diameter of the holes mentioned above.
- the pin 3 of the locking element is fitted with the pin 3 thread 9 of the locking element at one end.
- the pin 3 of the locking element is fitted with the lever 2 pin 4 of the locking element.
- the nut 6 of the locking element inside is shaped complementarily to the outer cutout of the wall of the lower cross profile arm. In this way the nut is locked against turning.
- the washer 5 of the locking element that is, put on the pin 3 of the locking element, inserted outside between the other wall of the lower cross profile arm and the lever 2 of the locking element to enable it turning in its outside flat surface .
- the pin 3 of the locking element has a radius cutout 10 in its middle part, the shape and dimensions of which correspond to the diameter of the recess 19 in the barrel nut 15.
- the radius cutout 10 enables in the position shown on the Fig.l to slip the rail lower handguard 1 over the barrel nut 15.
- the diameter of the pin 3 of the locking element matches the recess 19 in the barrel nut 15, which is described below.
- the piston rod case 8 is pressed in the case 7 of the bolt assembly carrier in its upper part.
- the piston rod case 8 is adapted to the upper groove 27 of the rail lower handguard 1 in shape and dimensions to assure an accurate mating with this upper groove 2_7.
- the upper groove 2_7 serves the blocking the radial motion of the rail lower handguard 1.
- barrel nut 15_ is generally used to fasten the barrel 17 to the case 7 of the bolt assembly carrier by means of screwing the barrel 17.
- the barrel nut 15 is fitted with an internal thread 23 and a barrel extension 28 in the known way.
- the outer ring recess 19 is modified, the dimensions and shape of which match the pin 3 of the locking element.
- the outer recess 19 is used to fasten the rail lower handguard 1 on the barrel nut 15 and thus on the gun.
- the rail lower handguard 1 After putting the rail lower handguard 1 on the barrel nut 15 up to the end stop to the case 7 of the bolt assembly carrier the rail lower handguard 1 is fastened on the barrel nut 15, and so on the gun, by means of turning the lever 2 of the locking element along with the pin 3 of the locking element.
- the pin 3 of the locking element after turning the lever 2 of the locking element by 180° from the position on the Fig.l in the position towards to the case 7 of the bolt assembly carrier 7, snaps in the recess 19 of the barrel nut 15. Namely after turning the lever 2 of the locking element by 180°, i.e. from the released position of the lever 2 of the locking element forwards to the locking position of the lever 2 of the locking element backwards, i.e.
- the pin 3 of the locking element snaps in the recess 19 on the barrel nut 15 with its middle part that is without a radius cutout 10.
- the rail lower handguard 1 is locked with the rest of the gun in this way.
- the barrel nut 15 is also used to fasten the rail lower handguard 1 on the rest of the gun.
- the barrel nut 15 is fitted with two cross holes 24 at least for the barrel lever 16. Further the barrel nut 15 has outer axial fixing grooves 25 of the barrel lever 16 ⁇ , which are assigned to the cross holes 2_4. These cross holes 24 and fixing grooves 25 are arranged mirror-reciprocally symmetrically to the axis of the barrel nut 15. These cross holes 24 and fixing grooves 25 are modified advantageously, equally distributed on the whole perimeter of the barrel nut 15.
- the barrel lever 16 is also created in this both-handed modification in this advantageous version, i.e. it is two-armed, whereas each of the arm snaps while turning in one cross hole 24.
- Fixing grooves 25 are used to fix the barrel lever 16 in its normal position in a parallel way with the barrel 17.
- the barrel lever 16 snaps in fixing grooves 25 after tilting in this position by means of a flexible pre-loading. It is possible to deduce the torque after turning the barrel lever 16 . by 90°, i.e. upright to the axis of the barrel 17, through the handle of the barrel lever 16 on the barrel nut 15.
- the barrel lever 16 is used to tighten or release the barrel nut 15 in this way, or from the case 7 of the bolt carrier.
- the barrel lever 16 snaps automatically in the fixing grooves 25 after the subsequent turning back in the parallel position with the barrel 17. These fixing grooves 25 prevent the barrel lever 16 to be tilted spontaneously in this way.
- the arms of the barrel lever 16 snap in side grooves lj3 of the rail lower handguard 1 and stay fixed in their positions there. Both these side grooves 18 are used to make the gun lighter, to cool the barrel, to cover the barrel lever 16 and to fix it further and so to disable the unwished or spontaneous handling the barrel lever 16, i.e. also the barrel nut 15, i.e. they are used to further locking against any unwanted release.
- This arrangement solves the barrel 17 exchange due to a repair or conversion to another gauge simply and without any tools .
- the arrangement the door pin 12_ and pressure spring 11 is used as a further locking element of the barrel nut 15 against its unwanted release, i.e. as locking the barrel nut 15.
- the pressure spring 11 of the door pin 12 ⁇ is in the pusher body 26 on the case 7 of the bolt assembly carrier and presses the door pin 12_ in the direction of its longitudinal axis forwards, i.e. to the barrel nut 15.
- the safety catch 13 of the barrel nut 15 is assured on the door pin 12 by means of the safety pin 14 of the safety catch 13.
- the safety catch 13 has a pawl 22 at its end, which is modified to co-operate with the grooving 20 on the front of the barrel nut 15.
- the safety pin 14 of the safety catch 13 is laid in the turned-"L"-form groove 21, which is created in the case 7 of the bolt carrier. After putting the pin 14_ in the turned-"L"-form groove 21, which disables the pin 14 to fall out spontaneously, the safety pin 14 is moving, which prevents the safety catch 13 to slip in the position enabling the pawl 22 of the safety catch 13 of the barrel nut 15 to snap in the grooving 20 on the front of the barrel nut 15.
- the pusher body 26 on the case 7 of the bolt assembly carrier is shown on the Fig.4b, when the pusher slope is modified under the angle of 19.5° regarding to the axis of the barrel 17. Also this change, i.e. the pusher slope reduction contributes further to a total slimness and compactness of the gun.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manipulator (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Toys (AREA)
Abstract
The arrangement to fasten the rail lower handguard (1) on a long gun contains a rail lower handguard (1), and a barrel nut (15) and a case (7) of the bolt carrier. The rail lower handguard (1) is created by an one-part hollow longitudinal profile shaped as a hollow cross in the cross-section, whereas in each of the profile arms there is a longitudinal groove inside (18, 27), namely un upper groove (27), two side grooves (18) of an angular cross-section and a lower groove, whereas all four grooves (18, 27) are joined in one hollow through a round opening. A locking mechanism against a mutual rotation of the rail lower handguard (1) and the barrel nut (15), which contains a clamp arrangement of the rail lower handguard (1) on the barrel nut (15), are assigned to the rail lower handguard (1).
Description
Arrangement to fasten the rail lower handguard on a long gun
Technical field
The invention concerns the arrangement to fasten the rail lower handguard on a long gun, namely without using tools. The arrangement to fasten the rail lower handguard on a long gun consists of a rail lower handguard, a barrel nut and a case of the bolt assembly carrier.
Prior art
Various plastic or aluminum multi-part castings of the rail lower handguard are mostly used in the state of the art. Moreover they lean against a gas extension. In addition to it, the rail lower handguard fastened in this way does not enable the barrel to run free and so it affects the gun accuracy in a negative way. Only some versions can be fitted with further rail bars by means of screws additionally, which enables to put on the supplementary equipment.
In the state of the art the rail lower handguard is fastened on the barrel nut in different ways, especially by means of screws, pawls, washers, etc., when various special tools and jigs are needed. The handling to fasten the rail lower handguard itself is also complicated or physically intensive in many cases.
Subject matter of the invention
Disadvantages of the existing state of the art are solved by the arrangement to fasten the rail lower handguard on a long gun, consisting of a rail lower handguard, a barrel nut and a case of the bolt assembly carrier, whereas the rail lower handguard is created by a one-part hollow longitudinal profile shaped as a hollow cross in the cross- section, whereas in each of the profile arms there is a longitudinal groove inside, namely un upper groove, then two side grooves angular in the section and a lower groove, whereas all four grooves are joined in one hollow through a round opening. The rail lower handguard has a safety mechanism against a mutual rotation of the rail lower handguard and the barrel nut that contains a clamp arrangement of the rail lower handguard on the barrel nut.
Another advantageous solution consists in the fact that the clamp arrangement contains a longitudinal through cutout created in the rear part of the rail lower handguard in the lower wall of the profile cross arm aiming downwards.
Another advantageous solution consists in the fact that in the rear part of the rail lower handguard above the through cutout in both side walls of the lower arm of its profile there is always one by one hole, which - from the side view - are created coaxially one by one, adversely to the longitudinal axis of the rail lower handguard.
Another advantageous solution consists in the fact that in the stated holes in the rail lower handguard the pin of
the locking element is modified, when it is fitted with a pin thread of the locking element at one end and with a lever of the locking element at the other end, whereas the nut of the locking element is modified at the threaded end of the locking element.
Another advantageous solution consists in the fact that the pin of the locking element has in its middle part a longitudinal radius cutout, the depth and radius of which correspond to the recess, which is modified in the barrel nut, whereas the diameter of the pin of the locking element matches the width appropriately, or the depth and diameter of the recess in the barrel nut.
Another advantageous solution consists in the fact that between the lever of the locking element and the corresponding wall of the lower cross profile arm and lever of the locking element on the pin of the locking element the washer of the locking element is modified, which has an outer flat surface upright to the pin axis of the locking element, which enables the lever of the locking element to turn .
Another advantageous solution consists in the fact that the nut of the locking element and/or the washer of the locking element is shaped inside complementar.ily to the outer cutout of the wall . of the lower cross profile arm to prevent spinning.
Another advantageous solution consists in the fact that the piston rod case is modified in the front upper part of case of the bolt assembly carrier, whereas the piston rod case and the upper groove of the rail lower handguard are
matched together in the shape and dimensions to common tight form mating.
Another advantageous solution consists in the fact that the upper groove of the rail lower handguard is of a half- round cross-section and the piston rod case is of a round cross-section.
Another advantageous solution consists in the fact that from outside of the rail lower handguard the relevant outer surfaces of the cross arms for fastening the additional accessories are fitted with standard profiles.
Another advantageous solution consists in. the fact that there are advantageously oval cutouts laid out between these standard profiles, especially to make the gun lighter and to improve its cooling.
Another advantageous solution consists in the fact that the barrel nut diameter is of 34mm.
The solution proposed enables to fasten the rail lower handguard by anybody who is competent to hold, carry and use the gun wherever he/she is just now without any tools needed .
In addition to it the diameter reduction of the barrel nut to 34mm, compared to the 40mm mostly used in the state of the art, together with the arrangement to fasten the rail lower handguard on the gun and its profile contributes to the fact that the solution proposed is by more than 10mm narrower than that one of the current guns.
Then the below described pusher slope reduction leads to an overall slimness and compactness of the gun.
So the overall slim appearance and compactness of the gun are further advantages leading also to a lower weight of the gun.
These solutions contribute to a comfortable usage of the gun substantially in this way, i.e. to easy using and handling also under heavier conditions.
Brief description of the drawings
The invention is more explained by means of concrete examples of versions illustrated on drawings, where it introduces
Fig. 1 the rail lower handguard in itself and arrangement to fasten
Fig. 2 the arrangement of the barrel nut with the lever of the barrel nut,
Fig. 3 the lock of the barrel nut against a self- release, and
Fig. 4 the modification of the gunlock pusher slope.
Description of preferred embodiments
Although the submitted solution is described in further
text in terms of certain preferential versions of individual parts and their assembly groups, this description is not intended to limit its scope only to these described versions. On the contrary, the intent of this description is to include and cover all alternatives, modifications and equivalents of such versions falling in the substance and pretended scope of the submitted solution so as it would be understood and eventually applied by an expert in the given technical field.
Then the above mentioned as well as further described characters according to the submitted solution can be also used separately in themselves or in arbitrary mutual combinations. Illustrated and described versions cannot be taken for a finished enumeration but they are rather more examples to understand the solution proposed.
The purpose of the rail lower handguard 1, represented on the Fig. 1, is to keep the long gun in a front hand, namely in the left hand as well as in the right one, in dependence on the fact if the shooting person is a right- handed person or a left-handed person. The rail lower handguard 1 does not lean against the barrel 17, but it is modified towards it with a play. It means that the rail lower handguard 1 does not lean against the barrel 17 and assures its free vibrations while shooting and so it assures a better concourse of shots or equability of the gun shot. This modification is called a "floating barrel".
As it is known by itself from the state of the art this rail lower handguard 1 can be fitted as necessary e.g. with a bipod, a supplementary handle, a laser gun sight or a tactical light.
The rail lower handguard 1 is created by a one-part hollow longitudinal profile shaped as a hollow cross in the cross-section. In each of the profile arms there is groove 18, 27 created inside. To be specific it is the upper groove 27 of a half-round cross-section, two side grooves 18 of an angular cross-section and a lower groove of an angular cross-section. All four grooves 18, 27 are joined in one hollow through a round opening. The diameter of this opening is sized so that the rail lower handguard 1 can be put on over the barrel nut 15 described below. From outside of the rail lower handguard 1 the relevant outer surfaces of the cross arms for fastening the additional accessories are fitted with standard profiles. Between these standard profiles there are advantageously oval cutouts laid out to make the gun lighter and to improve its cooling. In the rear part of the rail lower handguard 1 there is a longitudinal through cutout 29 created in the rear part of the rail lower handguard in the. lower wall of the profile cross arm aiming downwards. Furthermore there is always one by one hole in the rear part of the rail lower handguard 1 approximately over the middle of the through cutout 29 in both side walls of the lower profile arm. From the side view these holes are created coaxially one by one adversely to the longitudinal axis of the rail lower handguard 1.
It is further obvious from the Fig.l, that the pin 3 of the locking element is assigned to the rail lower handguard 1, and its diameter comes up to the diameter of the holes mentioned above. The pin 3 of the locking element is fitted with the pin 3 thread 9 of the locking element at one end. At the other end the pin 3 of the locking element is fitted with the lever 2 pin 4 of the locking element. By means of
the nut 6 of the locking element, that is modified by means of its thread at the thread end of the pin 3 of the locking element, and by means of the lever 2 of the locking element, that is fastened by means of the lever 2 pin 4 of the locking element at the other end of the pin 3 of the locking element, the pin 3 of the locking element is fastened on the rail lower handguard 1. To prevent turning, the nut 6 of the locking element inside is shaped complementarily to the outer cutout of the wall of the lower cross profile arm. In this way the nut is locked against turning. Similarly also the washer 5 of the locking element, that is, put on the pin 3 of the locking element, inserted outside between the other wall of the lower cross profile arm and the lever 2 of the locking element to enable it turning in its outside flat surface .
The pin 3 of the locking element has a radius cutout 10 in its middle part, the shape and dimensions of which correspond to the diameter of the recess 19 in the barrel nut 15. The radius cutout 10 enables in the position shown on the Fig.l to slip the rail lower handguard 1 over the barrel nut 15. The diameter of the pin 3 of the locking element matches the recess 19 in the barrel nut 15, which is described below.
As obvious from the Fig.2, the piston rod case 8 is pressed in the case 7 of the bolt assembly carrier in its upper part. The piston rod case 8 is adapted to the upper groove 27 of the rail lower handguard 1 in shape and dimensions to assure an accurate mating with this upper groove 2_7. The upper groove 2_7 serves the blocking the radial motion of the rail lower handguard 1. After putting the rail lower handguard 1 on the barrel nut 15 up to the
end stop to the case 7 of the bolt assembly carrier the piston rod case 8 co-operates with its shape joint with the upper groove 27 and so it disables the rail lower handguard 1 to turn, i.e. to make a radial motion of the rail lower handguard 1 on the barrel nut 15.
On the Fig.2 shown barrel nut 15_ is generally used to fasten the barrel 17 to the case 7 of the bolt assembly carrier by means of screwing the barrel 17. In addition to it the barrel nut 15 is fitted with an internal thread 23 and a barrel extension 28 in the known way. On the barrel nut 15 the outer ring recess 19 is modified, the dimensions and shape of which match the pin 3 of the locking element. The outer recess 19 is used to fasten the rail lower handguard 1 on the barrel nut 15 and thus on the gun.
After putting the rail lower handguard 1 on the barrel nut 15 up to the end stop to the case 7 of the bolt assembly carrier the rail lower handguard 1 is fastened on the barrel nut 15, and so on the gun, by means of turning the lever 2 of the locking element along with the pin 3 of the locking element. The pin 3 of the locking element, after turning the lever 2 of the locking element by 180° from the position on the Fig.l in the position towards to the case 7 of the bolt assembly carrier 7, snaps in the recess 19 of the barrel nut 15. Namely after turning the lever 2 of the locking element by 180°, i.e. from the released position of the lever 2 of the locking element forwards to the locking position of the lever 2 of the locking element backwards, i.e. to the case 1_ of the bolt carrier, the pin 3 of the locking element snaps in the recess 19 on the barrel nut 15 with its middle part that is without a radius cutout 10. The rail lower handguard 1 is locked with the rest of the gun in this way. According
to the solution proposed the barrel nut 15 is also used to fasten the rail lower handguard 1 on the rest of the gun.
However while turning the lever 2 of the locking element as described above by means of the longitudinal through cutout 29, which is arranged axially in the lower wall of the rail lower handguard 1 and modified to be able to clamp the sides of the rail lower handguard 1 around the barrel nut 15, the pin 3 of the locking element is being tightened while its turning. The thread of the pin 3 of the locking element is pulled in the thread of the nut 6 and so the rail lower handguard 1 is clamped firmly on the barrel nut 15. The rail lower handguard is fastened on the barrel nut 15_ both by locking and by clamping in this way. The firm clamping of the rail lower handguard 1 on the barrel nut 15 together with co-operation of the piston rod case 8 with the upper groove 27 as described above locks also the barrel nut 15 against its unwished release.
As further obvious from the Fig.2, the barrel nut 15 is fitted with two cross holes 24 at least for the barrel lever 16. Further the barrel nut 15 has outer axial fixing grooves 25 of the barrel lever 16^, which are assigned to the cross holes 2_4. These cross holes 24 and fixing grooves 25 are arranged mirror-reciprocally symmetrically to the axis of the barrel nut 15. These cross holes 24 and fixing grooves 25 are modified advantageously, equally distributed on the whole perimeter of the barrel nut 15. The barrel lever 16 is also created in this both-handed modification in this advantageous version, i.e. it is two-armed, whereas each of the arm snaps while turning in one cross hole 24. Fixing grooves 25 are used to fix the barrel lever 16 in its normal position in a parallel way with the barrel 17. The barrel
lever 16 snaps in fixing grooves 25 after tilting in this position by means of a flexible pre-loading. It is possible to deduce the torque after turning the barrel lever 16. by 90°, i.e. upright to the axis of the barrel 17, through the handle of the barrel lever 16 on the barrel nut 15. By means of the swivel mounting of the barrel lever 16 in the cross holes 24 with the possibility to swivel it by 90° downwards from the position in a parallel way with the barrel 17, i.e. with the bend handle in the position at barrel 17 (see Fig.3), the barrel lever 16 is used to tighten or release the barrel nut 15 in this way, or from the case 7 of the bolt carrier. The barrel lever 16 snaps automatically in the fixing grooves 25 after the subsequent turning back in the parallel position with the barrel 17. These fixing grooves 25 prevent the barrel lever 16 to be tilted spontaneously in this way. After putting the rail lower handguard 1 on the barrel lever 16 the arms of the barrel lever 16 snap in side grooves lj3 of the rail lower handguard 1 and stay fixed in their positions there. Both these side grooves 18 are used to make the gun lighter, to cool the barrel, to cover the barrel lever 16 and to fix it further and so to disable the unwished or spontaneous handling the barrel lever 16, i.e. also the barrel nut 15, i.e. they are used to further locking against any unwanted release.
This arrangement solves the barrel 17 exchange due to a repair or conversion to another gauge simply and without any tools .
The arrangement the door pin 12_ and pressure spring 11 , as shown on the Fig.3, is used as a further locking element of the barrel nut 15 against its unwanted release, i.e. as locking the barrel nut 15. The pressure spring 11 of the
door pin 12^ is in the pusher body 26 on the case 7 of the bolt assembly carrier and presses the door pin 12_ in the direction of its longitudinal axis forwards, i.e. to the barrel nut 15. There is a safety catch ^13 of the barrel nut 15 on the door pin 12. The safety catch 13 of the barrel nut 15 is assured on the door pin 12 by means of the safety pin 14 of the safety catch 13. The safety catch 13 has a pawl 22 at its end, which is modified to co-operate with the grooving 20 on the front of the barrel nut 15. The safety pin 14 of the safety catch 13 is laid in the turned-"L"-form groove 21, which is created in the case 7 of the bolt carrier. After putting the pin 14_ in the turned-"L"-form groove 21, which disables the pin 14 to fall out spontaneously, the safety pin 14 is moving, which prevents the safety catch 13 to slip in the position enabling the pawl 22 of the safety catch 13 of the barrel nut 15 to snap in the grooving 20 on the front of the barrel nut 15.
The barrel nut 15 is assured against releasing further totally safely in this way. So these arrangements guarantee a totally perfect locking both of the barrel nut 15, and also of the rail lower handguard 1. against their release while shooting.
This way of fastening the rail lower handguard 1 can be applied after a light modification also for other guns with the case 7 of the bolt assembly carrier or another blocking the radial motion of the rail lower handguard 1.
The pusher body 26 on the case 7 of the bolt assembly carrier is shown on the Fig.4b, when the pusher slope is modified under the angle of 19.5° regarding to the axis of the barrel 17. Also this change, i.e. the pusher slope
reduction contributes further to a total slimness and compactness of the gun.
The ergonomic shape of the case 7 of the bolt assembly carrier and of the rail lower handguard 1, especially their slim line following especially from the above mentioned solutions of the arrangement to fasten the rail lower handguard 1 on the gun and arrangement to lock the barrel nut 15, lead to a very user-friendly, ergonomic, non- interchangeable and unique general arrangement of the gun.
References stated in the dependent claims refer to further performance of the subject to the main claim by means of features of the relevant dependent claim. Nevertheless this does not mean a resignation to achieve a separate, subject protection for the features of these dependent claims .
List of reference characters Rail lower handguard
Lever of the locking element
Pin of the locking element
Lever pin of the locking element Washer of the locking element
Nut of the locking element
Case of the bolt assembly carrier Piston rod case
Pin thread of the locking element Radius cutout
Pressure spring
Door pin
Safety catch
Safety pin
Barrel nut
Barrel lever
Barrel
Side groove
Recess
Grooving
Turned-"L"-form groove
Pawl
Thread of the barrel nut
Cross hole
Fixing groove
Pusher body
Upper groove
Barrel extension
Through cutout
Claims
- 14 - 2013/010515 PCT/CZ2012/000062
C LAI MS
The arrangement to fasten the rail lower handguard (1) on a long gun, containing the rail lower handguard (1) , and barrel nut (15) and case (7) of the bolt assembly carrier, the rail lower handguard (1) is created by a one-part hollow longitudinal profile shaped as a hollow cross in the cross-section, whereas there is a longitudinal groove inside (18, 27) in each of the profile arms, namely un upper groove (27) , two side grooves (18) of an angular cross-section and a lower groove, whereas all four grooves (18, 27) are joined in one hollow through a round opening, characterized in that a locking mechanism against a mutual rotation of the rail lower handguard (1) and the barrel nut (15) , which contains a clamp arrangement of the rail lower handguard (1) on the barrel nut (15) , are assigned to the rail lower handguard (1) .
The arrangement of claim 1, wherein the clamp arrangement contains a longitudinal through cutout (29) created in the rear part of the rail lower handguard (1) in the lower wall of the profile cross arm aiming downwards .
The arrangement of claim 2, wherein in the rear part of the rail lower handguard (1) above the through cutout (29) in both side walls of the lower arm of its profile there is always one by one hole, which - from the side view - are created coaxially one by one, adversely to the longitudinal axis of the rail lower handguard (1) .
- 15- 2013/010515 PCT/CZ2012/000062
The arrangement of claim 3, wherein in the stated holes in the rail lower handguard (1) the pin (3) of the locking element is modified, which has the pin (3) thread (9) of the locking element at one end and it has the lever (2) of the locking element at the other end, whereas the nut (6) of the locking element is modified at the threaded end of the pin (3) of the locking element .
The arrangement of claim 4, wherein the pin (3) of the locking element has a longitudinal radius cutout (10) in the middle part, the depth and radius of which match the recess (19) , which is modified in the barrel nut (15) , whereas the diameter of the pin (3) of the locking element matches the weight, or depth and diameter of the recess (19) in the barrel nut (15) appropriately .
The arrangement of claim 3 or 4 wherein between the lever (2) of the locking element and the relevant wall of the lower cross profile arm and the lever (2) of the locking element on the pin (3) of the locking element there is a modified washer (5) of the locking element, which has an outer flat surface, upright to the axis of the pin (3) of the locking element to enable the swivel motion of lever (2) of the locking element.
The arrangement of claim 6, wherein the nut (6) of the locking element and/or washer (5) of the locking element inside is shaped complementarily to the outer cutout of the wall of the lower cross profile arm to prevent turning.
- 16 -
WO 2013/010515 PCT/CZ2012/000062
8. The arrangement of any of claims 1-7, wherein there is a modified piston rod case (8) in the case (7) of the bolt assembly carrier in its upper front part, whereas the piston rod case (8) and the upper groove (27) of the rail lower handguard (1) matched together in the shape and dimensions to common tight form mating.
9. The arrangement of claim 8, wherein the upper groove (27) of the rail lower handguard (1) is of a half-round cross-section and piston rod case (8) is of a round cross-section.
10. The arrangement of any of claims 1-9, wherein the relevant outer surfaces of the cross arms for fastening the additional accessories are fitted with standard profiles from outside of the rail lower handguard (1) .
11. The arrangement of claim 10, wherein between these standard profiles there are advantageously oval cutouts arranged, especially to make the gun lighter and to improve its cooling.
12. The arrangement of any of claims 1-11, wherein the barrel nut (15) diameter is of 34mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZPV2011-444 | 2011-07-21 | ||
| CZ20110444A CZ303588B6 (en) | 2011-07-21 | 2011-07-21 | Arrangement for attachment of rail fore-stock for long firearms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013010515A1 true WO2013010515A1 (en) | 2013-01-24 |
Family
ID=46682614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CZ2012/000062 WO2013010515A1 (en) | 2011-07-21 | 2012-07-11 | Arrangement to fasten the rail lower handguard on a long gun |
Country Status (2)
| Country | Link |
|---|---|
| CZ (1) | CZ303588B6 (en) |
| WO (1) | WO2013010515A1 (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8904691B1 (en) * | 2013-07-25 | 2014-12-09 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US20140373419A1 (en) * | 2013-06-25 | 2014-12-25 | Lamonte L. Leclair | Firearm Hand Guard |
| EP2894431A1 (en) * | 2014-01-13 | 2015-07-15 | Ra Brands, L.L.C. | Hand guard installation mechanism |
| USD741978S1 (en) | 2014-01-23 | 2015-10-27 | Ra Brands, L.L.C. | Portion of a firearm handguard |
| US9377274B2 (en) | 2014-02-05 | 2016-06-28 | Bravo Company USA, Inc. | Coupling firearm accessories to a firearm |
| US9383163B2 (en) | 2014-01-10 | 2016-07-05 | Bravo Company USA, Inc. | Firearm accessory keyhole locking interface |
| US9791239B1 (en) | 2016-05-12 | 2017-10-17 | Bravo Company Mfg. Inc. | Firearm handguard assembly |
| USD844091S1 (en) | 2016-10-20 | 2019-03-26 | Bravo Company Mfg, Inc. | Firearm handguard |
| US10260838B1 (en) | 2016-10-20 | 2019-04-16 | Bravo Company Mfg, Inc. | Firearm handguard |
| US10260841B2 (en) | 2016-10-20 | 2019-04-16 | Bravo Company Mfg, Inc. | Firearm accessory mounting system |
| US10295304B1 (en) | 2016-05-12 | 2019-05-21 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US10551145B2 (en) | 2017-10-18 | 2020-02-04 | Bravo Company Mfg, Inc. | Modular key-slot accessory mounting system for a firearm |
| US10712123B2 (en) | 2017-06-08 | 2020-07-14 | Springfield, Inc. | Free floating handguard anchoring system |
| US10775129B1 (en) | 2019-09-20 | 2020-09-15 | Bravo Company Mfg, Inc. | Handguard mount with tie bar |
| US10900743B2 (en) | 2016-05-12 | 2021-01-26 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| USD912189S1 (en) | 2019-04-29 | 2021-03-02 | Bravo Company Mfg, Inc. | Firearm handguard |
| USD923129S1 (en) | 2017-06-08 | 2021-06-22 | Springfield, Inc. | Free floating handguard anchoring system |
| EP4194795A1 (en) | 2021-12-10 | 2023-06-14 | Glock Technology GmbH | Device for forming a secondary attachment of a front shaft |
| IL271624B1 (en) * | 2019-12-19 | 2023-08-01 | Israel Weapon Ind I W I Ltd | Secure firearm handguard with quick release |
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| US7836625B2 (en) * | 2007-10-05 | 2010-11-23 | S&S Precision, Llc | Low profile mount and foregrip for firearm |
| US20100175293A1 (en) * | 2009-01-11 | 2010-07-15 | Steve Hines | Two piece rail system for firearm |
| US20100192443A1 (en) * | 2009-01-16 | 2010-08-05 | Prototype Productions, Inc. | Rifle accessory rail, communication, and power transfer system - communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005037884B3 (en) * | 2005-08-10 | 2007-01-18 | Heckler & Koch Gmbh | Adapter component for firearm has clamping element acting on it which is elastically deformed when adapter component is adjusted |
| US7523580B1 (en) * | 2005-11-07 | 2009-04-28 | Jerome Benedict Tankersley | Handguard system integrated to a firearm |
| US20110061281A1 (en) * | 2009-04-30 | 2011-03-17 | Smith & Wesson Corp. | Firearm hand guard rail system |
| US20110000119A1 (en) * | 2009-07-02 | 2011-01-06 | Desomma Frank | Two piece upper reciever for firearms |
| US20110126443A1 (en) * | 2009-12-01 | 2011-06-02 | Sig Sauer, Inc. | Handguard system for firearms |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9157697B2 (en) * | 2013-06-25 | 2015-10-13 | Centurian Arms, LLC | Firearm hand guard |
| US20140373419A1 (en) * | 2013-06-25 | 2014-12-25 | Lamonte L. Leclair | Firearm Hand Guard |
| US8904691B1 (en) * | 2013-07-25 | 2014-12-09 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US9383163B2 (en) | 2014-01-10 | 2016-07-05 | Bravo Company USA, Inc. | Firearm accessory keyhole locking interface |
| EP2894431A1 (en) * | 2014-01-13 | 2015-07-15 | Ra Brands, L.L.C. | Hand guard installation mechanism |
| US9464865B2 (en) | 2014-01-13 | 2016-10-11 | Ra Brands, L.L.C. | Hand guard installation mechanism |
| USD741978S1 (en) | 2014-01-23 | 2015-10-27 | Ra Brands, L.L.C. | Portion of a firearm handguard |
| US9377274B2 (en) | 2014-02-05 | 2016-06-28 | Bravo Company USA, Inc. | Coupling firearm accessories to a firearm |
| US9791239B1 (en) | 2016-05-12 | 2017-10-17 | Bravo Company Mfg. Inc. | Firearm handguard assembly |
| US10126094B2 (en) | 2016-05-12 | 2018-11-13 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US11686551B2 (en) | 2016-05-12 | 2023-06-27 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US11248874B2 (en) | 2016-05-12 | 2022-02-15 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US10900743B2 (en) | 2016-05-12 | 2021-01-26 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| US10295304B1 (en) | 2016-05-12 | 2019-05-21 | Bravo Company Mfg, Inc. | Firearm handguard assembly |
| USD872218S1 (en) | 2016-10-20 | 2020-01-07 | Bravo Company Mfg, Inc. | Firearm handguard |
| USD879904S1 (en) | 2016-10-20 | 2020-03-31 | Bravo Company Mfg, Inc. | Firearm handguard |
| US10260841B2 (en) | 2016-10-20 | 2019-04-16 | Bravo Company Mfg, Inc. | Firearm accessory mounting system |
| USD844091S1 (en) | 2016-10-20 | 2019-03-26 | Bravo Company Mfg, Inc. | Firearm handguard |
| USD919034S1 (en) | 2016-10-20 | 2021-05-11 | Bravo Company Mfg, Inc. | Firearm handguard |
| US10260838B1 (en) | 2016-10-20 | 2019-04-16 | Bravo Company Mfg, Inc. | Firearm handguard |
| US11131525B2 (en) | 2017-06-08 | 2021-09-28 | Springfield, Inc. | Free floating handguard anchoring system |
| US10712123B2 (en) | 2017-06-08 | 2020-07-14 | Springfield, Inc. | Free floating handguard anchoring system |
| US11740051B2 (en) | 2017-06-08 | 2023-08-29 | Springfield, Inc. | Free floating handguard anchoring system |
| USD923129S1 (en) | 2017-06-08 | 2021-06-22 | Springfield, Inc. | Free floating handguard anchoring system |
| US11125530B2 (en) | 2017-10-18 | 2021-09-21 | Bravo Company Mfg, Inc. | Modular key-slot accessory mounting system for a firearm |
| US10551145B2 (en) | 2017-10-18 | 2020-02-04 | Bravo Company Mfg, Inc. | Modular key-slot accessory mounting system for a firearm |
| USD912189S1 (en) | 2019-04-29 | 2021-03-02 | Bravo Company Mfg, Inc. | Firearm handguard |
| US11365953B2 (en) | 2019-09-20 | 2022-06-21 | Bravo Company Mfg, Inc. | Handguard mount with tie bar |
| US10775129B1 (en) | 2019-09-20 | 2020-09-15 | Bravo Company Mfg, Inc. | Handguard mount with tie bar |
| IL271624B1 (en) * | 2019-12-19 | 2023-08-01 | Israel Weapon Ind I W I Ltd | Secure firearm handguard with quick release |
| EP4194795A1 (en) | 2021-12-10 | 2023-06-14 | Glock Technology GmbH | Device for forming a secondary attachment of a front shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ2011444A3 (en) | 2012-12-27 |
| CZ303588B6 (en) | 2012-12-27 |
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