RU2237845C2 - Submachine gun subbarrel grenade launcher - Google Patents

Abstract

FIELD: weaponry, applicable in weapon systems combining a submachine gun and a subbarrel grenade launcher.

SUBSTANCE: the submachine gun barrel is installed in the hole of the rear post made in the form of a plate attached to the front part of the receiver. Fastened on the side of the receiver on a thread is the breech end of the submachine gun, the lateral sides of the post and the lower side are bent aside forward. The fore end with the pistol handle and the trigger bow are box-shaped. The rear wall of the fore end is installed with a rest in the plane of the rear post and a groove open from the top is made in it, a through cross-sectional hole is made in the side walls of the fore end under the outer surface of the barrel, a cotter pin with a lock is installed in this hole. The front post is installed for axial motion at the front wall of the fore end on the lower part of the foresight bracket.

EFFECT: preserved characteristics of closely grouped fire within the preset norms during the whole service life.

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Description

The invention relates to weapons technology and can be used in weapon systems combining an assault rifle and a grenade launcher.

Known grenade launchers for standard small arms, such as the GP-25 grenade launcher [1] for Kalashnikov assault rifles. The grenade launcher is made in the form of a weapon containing a rifled barrel, breech, a grenade launcher attachment to the machine. On the barrel of the grenade launcher two tides of the “dovetail” type are made for press connection with an arm. The front and rear bracket supports have seats for mounting on the barrel of the machine in front of it in front of the gas cylinder. Inside the bracket there is a bracket latch that holds the grenade launcher from the longitudinal displacement of the grenade launcher relative to the machine.

Also known is the 30 mm American M203 grenade launcher mounted on 5.56 mm M16 rifles [2].

The design of this grenade launcher also contains a rifled barrel, a receiver with elements for attaching to a rifle and a trigger mechanism. For firing from a grenade launcher used shell ammunition charged from the breech of the barrel. To load and unload the grenade launcher, the barrel shifts it forward after turning off the special latch. After the grenade is inserted into the barrel, the shooter shifts it back all the way.

The disadvantages of domestic and American underbarrel grenade launchers include the increased mass of the machine with a grenade launcher, as well as the non-optimal mounting scheme of grenade launchers on small arms, since the balance of the “automatic grenade launcher” complex is violated due to the significant weighting of the muzzle of the complex. The shooter holds the weapon with the right hand on the handle of the machine, and the left - holds the grenade launcher and performs the necessary operations for firing from the grenade launcher.

A more advanced layout of the machine with a grenade launcher was used in the patent RU No. 2117898 [3], which was selected as a prototype. The machine is made according to the “bullpup” scheme, i.e. the fire control handle is located in front of the store, and the butt is mounted directly on the receiver. The advantage of this scheme is a good balance of all weapons and a significant reduction in size along the length. The above machine gun with a grenade launcher contains a receiver with a lid, a machine gun barrel with a breech fixed in the receiver, a forearm with a pistol grip and a trigger guard, a grenade launcher barrel with a breech. The grenade launcher body is mounted on the barrel in the muzzle and is equipped with a clamp against longitudinal displacement. The recoil momentum of a grenade is 3-4 times greater than the recoil momentum of a cartridge depending on its caliber, so mounting a grenade launcher on the muzzle of the barrel can lead to a deterioration in the accuracy of firing from an automatic machine when firing a grenade launcher, which is a disadvantage of the prototype.

The objective of the invention is to reduce the force impact on the muzzle of the barrel of the machine at the mounting point of the under-barrel grenade launcher when firing from the grenade launcher, which allows you to maintain the accuracy of firing from the machine within the specified limits throughout the entire resource.

The technical result is achieved by the fact that in a submachine gun with a barrel grenade launcher containing a receiver with a lid, the barrel of the submachine gun with the breech fixed in the receiver, the forearm with the pistol grip and the trigger guard, the barrel of the grenade launcher with the breech and the mount of the grenade launcher to the submachine gun:

- the barrel is made in the breech with a shoulder and thread and installed in the hole of the rear pillar, made in the form of a plate attached to the front of the receiver;

- from the receiver on the threaded part of the barrel is fixed breech;

- the sides of the rear pillar and the lower side are bent forward;

- forend with a pistol grip and trigger guard is made box-shaped, open from above;

- the rear wall of the forend is installed with emphasis in the plane of the rear rack and it is made open on top of the groove;

- in the side walls of the rear rack and the side walls of the forend under the outer surface of the barrel, a through cross hole is made in which a check with a latch is installed;

- at the front wall of the forearm on the outer part of the front sight pads, a front strut is installed with the possibility of axial movement, in which a groove open from above is made in the shape of the lower part of the front sight pad;

- in the front rack and front wall of the forearm is made parallel to the axis of the barrel bore a stepped hole in which the breech of the grenade launcher is mounted, fixed on the inside of the forearm by a nut;

- in the lower part of the trigger guard is made through the transverse groove.

The invention is illustrated by drawings.

Figure 1 shows a General view of the machine with a grenade launcher with a partial longitudinal section along the breech of the barrel, the breech of the grenade launcher front rack and forearm; figure 2 shows a longitudinal section along the receiver and forearm at the location of the checks; figure 3 shows a cross section of the front sight, front desk and breech grenade launcher.

Machine with a grenade launcher contains a receiver 1 with a cover 2. To the front of the receiver attached rear rack 3, made in the form of a plate, the sides 4 of the rear rack and the lower side 5 are bent forward. On the barrel of the machine 6, a shoulder 7 and a thread 8 are made in the breech side. The barrel with its breech side is installed in the hole 9 of the rear rack until the shoulder abuts against the plane of the rack. From the side of the receiver, the breech 10 is screwed on the thread 8. The forend 11 with the pistol grip 12 and the trigger 13 is made box-shaped, open at the top. The rear wall of the forend 14 is installed all the way into the front plane of the rear rack and it is made open on top of the groove in which the shoulder of the barrel is placed. In the side walls of the rear rack and the side walls of the forend under the outer surface of the barrel there is a through transverse hole 15 in which a pin 16 with a retainer 17 is installed. At the front wall of the forearm 18 on the lower part of the base of the front sight block 19, the front strut 20 is mounted with axial movement which is made open at the top of the groove 21 in the form of the lower part of the pads of the front sight 22. In the front rack and front wall of the forend is made a stepped hole parallel to the axis of the barrel. A grenade launcher breech 23 is mounted in it, fixed on the inside of the forearm by a nut 24. A grenade launcher barrel 25 is mounted on the breech. A transverse groove 26 is made in the lower part of the trigger guard 13. The machine gun and the under-barrel grenade launcher in the above construction can be equipped with separate trigger mechanisms with each shooting control from its trigger, and a single trigger with control from one trigger.

When fired from an under-barrel grenade launcher, the pressure of the powder gases at the bottom of the sleeve through the breech is transferred to the front movable rack and then through the forearm to the rear rack and receiver, which significantly reduces the load acting on the barrel when firing from the grenade launcher. The latter circumstance reduces the possibility of bending the barrel of an assault rifle when firing from a grenade launcher during its operation, which allows you to maintain the accuracy of firing from an assault rifle within predetermined limits throughout the entire resource.

The presence of a through transverse groove on the trigger eliminates the possibility of its breakage when firing from a grenade launcher.

The present invention was tested on a prototype submachine gun with grenade launcher with positive results.

SOURCES OF INFORMATION

1. 40-mm grenade launcher GP-25, “Service Manual”, Military Publishing House of the USSR Ministry of Defense, 1983

2. Handbook “Jane's Infantry Weapons”, USA, 1981-82, p.401.

3. Patent RU No. 2117898 for class. 6 F 41 C 27/06, publ. 08/20/98

Claims (2)

1. Submachine gun with a grenade launcher, comprising a receiver with a lid, a machine gun barrel with a breech fixed in the receiver, a forearm with a pistol grip and a trigger guard, a grenade barrel with a breech and a grenade launcher attachment to the machine, characterized in that the barrel of the machine is made in the breech with a shoulder and a thread, installed in the hole of the rear pillar, made in the form of a plate attached to the front of the receiver, the breech of the machine is fixed on the thread from the receiver side, the sides of the rear pillar and the bottom side are bent forward, the forend with the pistol grip and the trigger guard is made box-shaped, open from above, the rear wall of the forearm is mounted with emphasis in the plane of the rear pillar and it has a groove open from above, in the side walls of the rear pillar and side walls the fore-end under the outer surface of the barrel has a through transverse hole in which a check with a latch is installed; at the front wall of the fore-end on the lower part of the front sight block, it is mounted with the possibility of axial displacement before Thread rack, which is formed in an upwardly open groove shaped bottom of the pad flies in the A-pillar and the front wall of the fore-end formed parallel bore axis stepped bore, there is mounted breech grenade mounted on the inside forearm nut. 2. Automatic with a grenade launcher according to claim 1, characterized in that in the lower part of the trigger guard is made through a transverse groove.

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