RU2172461C2 - Submachine gun with subcaliber projectile - Google Patents

Abstract

FIELD: small arms. SUBSTANCE: the submachine gun has a barrel, receiver, gas mechanism tube, opening for installation of the magazine with ammunition made with a plastic casing, magazine for ammunition, fore sight, common grip for submachine gun and subcaliber projectile. The muzzle brake of the submachine gun additionally serves as a compensator-flash suppresser and is made in the form of a body with a gas chamber. The lateral sides of the muzzle brake body have 5 ports each measuring 0.6 of the caliber with a spacing of 0.6 of the caliber and axial ducts with hemispherical seats. EFFECT: enhanced efficiency of the weapon due to the use of the submachine gun with the subcaliber projectile complete with the silencer, optical sight or infrared side and knife bayonet without their detachment during fire. 2 dwg

Description

 The invention relates to the field of small arms and is intended for firing simultaneously or separately in manpower and armored vehicles such as infantry fighting vehicles and light protection structures.

The 5.45 mm AK-74 assault rifle with the GP-25 grenade launcher is known (magazine "Shotgun. Arms and Ammunition," N 5-6 p. 23 published by St. Petersburg, 1997)
It consists of a 5.45 mm assault rifle barrel and GP-25 grenade launcher, made according to the classical scheme. It includes a handle mounted at an angle of 105 ^o to the axis of the bore, a folding butt, a magazine located in front of the handle, a mechanical sight with a front sight, a muzzle brake with three internal partitions and a compensator. The underbarrel grenade launcher consists of a barrel, a handle and a trigger mechanism.

 The author is taken as an analog.

Significant disadvantages of the analogue are:
the angle of the handle is small (105 ^o ) to the axis of the center of the barrel channel, which is especially inconvenient when firing from the belt, from the hip, impairs applicability, reduces accuracy;
the classical scheme increases the dimensions of the weapon, which makes it difficult to use it in narrow (cramped) places (armored vehicles, tanks), there is a loss of time for preparing weapons for aimed shooting; the design of the window for installing the magazine creates inconvenience when reloading, hindering the accuracy of the magazine hitting the attachment point, slowing down and complicating the reloading process;
in the presence of a fixed bayonet-knife, it is impossible to fire from a grenade launcher;
the muzzle brake inside is equipped with partitions, which significantly reduces the accuracy and accuracy of fire;
the size of the compensation window on the muzzle brake is 3-4 times the caliber of the barrel, contributing to the creation of a dynamic blow when fired, reducing firing efficiency.

 Known 7.62 mm machine gun with a grenade launcher - "Thunderstorm" (magazine "Armory" N 16, p. 4, ed. Moscow, 1998). It consists of a barrel, a receiver, a gas mechanism tube, a window for installing an ammunition magazine, an ammunition magazine, a muzzle brake, a front sight, a common firing handle for a machine gun and a grenade launcher.

 This machine is accepted by the author as a prototype.

Significant disadvantages of the prototype are:
the design of the window for installing the magazine creates inconvenience when reloading, hindering the accuracy of the magazine hitting the attachment point, slowing down and complicating the reloading process;
the presence of several internal partitions in the muzzle brake creates excessive vibration of the weapon during firing, increases dispersion and reduces firing accuracy;
the size of the compensation window on the muzzle brake is 4-5 times the caliber of the barrel, contributing to the creation of a dynamic blow when fired, reducing the effectiveness of shooting;
the chosen rate of fire of the machine leads to increased consumption of ammunition without increasing efficiency.

 The claimed machine with a grenade launcher eliminates the significant disadvantages of the prototype.

 The task to which the claimed invention is directed is to increase the effectiveness of the weapon due to the possibility of using an assault rifle with an under-barrel grenade launcher in combination with a silencer, an optical sight or night vision sight and a bayonet-knife, without disconnecting them for the duration of firing from an assault rifle or grenade launcher, what makes this weapon indispensable in any situation for all military branches.

 It consists of a barrel, a receiver, a gas mechanism tube, a window for installing an ammunition magazine, made with a plastic casing, an ammunition magazine, a muzzle brake, which is additionally a compensating flame arrester and made in the form of a case with a gas chamber. At the same time, 5 holes of 0.6 caliber size with an interval of 0.6 caliber and axial grooves with hemispherical nests are made on the sides of the muzzle brake housing on the sides.

 In FIG. 1 shows a general view of a submachine gun launcher (Bullpup layout diagram).

 It consists of a 7.62 mm machine gun barrel 1, receiver 2, receiver cover 3, magazine 4, machine gun and grenade launcher firing handle 5, grenade launcher barrel 6, grenade launcher trigger mechanism 7, casing 8, muzzle brake 9, magazine latch 10 .

 The machine contains plastic pads 11, sight 12, front sight 13, swivel 14, protrusions 15 for attaching a bayonet-knife, muzzle brake lock 16, butt plate 17, gas mechanism tube 18.

 Machine with a grenade launcher works as follows.

To load the machine into the window, closed by a casing 8, a magazine 4 loaded with cartridges is inserted until it is locked with a latch 10, a fire translator is installed, the shutter frame with the shutter is retracted to its extreme rear position and released without accompanying hand. At the same time, the cartridge shuttles into the chamber, turning and locking the shutter with the frame. Improving the effectiveness of firing is achieved due to the location of the firing handle 5 at an angle of 115 ^o to the axis of the barrel. The handle 5 has a wedge-shaped shape with curly cutouts for the fingers on the front, which eliminates the sliding of the hand on the handle. The combination of the angle of inclination of the handle and its wedge-shaped shape ensures the applicability of the weapon, increasing accuracy and accuracy of the battle, convenience when firing in a standing position from the hip, reduces the throwing of the weapon during firing.

The design uses a GP-30 grenade launcher, which has a fire control handle common with the machine gun. Turning the spring-loaded fire translator through 180 ^o allows you to use the same descent to shoot grenades or shoot from a bullet barrel. The barrel of the grenade launcher 6, protected by a plastic casing, simultaneously performs the function of the forearm of the weapon.

 The window for installing the magazine 4 is closed by a plastic casing 8, which has a peculiar oval shape and is integrated with the handle 5. The presence in the casing of the neck helps to securely hold the magazine and protects the fighter’s hand from contact with open metal at the time of overheating or freezing of the receiver. At the bottom of the neck of the casing has an extension for quick and convenient reloading of the store.

 Plastic pads 11, located on the receiver 2 and on the cover of the receiver 3, provide convenience, applicability when shooting, exclude freezing of the skin when freezing and burns when heating weapons. In addition to technical solutions, plastic linings visually create the image of the butt, greatly improving the design of the machine, giving it a finished look.

 The barrel 1 of the machine has a length of 450 mm. This barrel length helps to increase penetration, effective firing range, flatness of the bullet, as well as improve the balance of weapons. At the end of the barrel is a stand with a clutch. The coupling has an external thread for wounding the muzzle brake. On the rack are two protrusions 15 for attaching a bayonet-knife in the upper or lower position, as well as a latch 16 for fixing the muzzle brake 9. The tube of the gas mechanism 18 has no overlays.

The sighting line has a length of 210 mm, which improves aiming and accuracy. The open sight 12 is similar to that used in serial samples with structural changes, namely: the aiming strip has a longitudinal slot 6 mm wide, the length of the entire scale with divisions, the clamp has a 3.5 * 4 mm slot in the upper part, which is visible through the slot of the aiming strip for aiming through the fly at the target. For convenient determination of the distance to the target on both sides of the aiming strip, a scale with divisions indicating the firing range is plotted. In the combat position, the sight is mounted at an angle of 90 ^o to the axis of the barrel. In the stowed position, the sight develops along the barrel.

 For more convenient carrying weapons in a position on the shoulder and quick preparation for firing on the lower part of the receiver is an additional swivel 14 for connecting a gun belt. This option of fastening the belt allows you to position the weapon along the body of the soldier when wearing, which makes the weapon practically not protruding beyond the dimensions of the soldier and makes it convenient to pass in narrow, cramped places, in wooded areas, etc. and at the same time, it allows you to maintain the ability to instant production for aimed shooting.

 In FIG. 2 shows a muzzle brake.

 The muzzle brake includes a housing 19, a front brake wall 20, axial grooves 21, hemispherical sockets 22, holes 23, shoulders for mounting a bayonet-knife 24, a bullet hole 25, a muzzle brake chamber 26.

 The muzzle brake works as follows: when fired, the bullet covers the bullet hole 25, the powder gases, hitting the front brake wall 20, act as brakes and rush into the holes 23, preventing the front of the barrel from tipping over.

 The holes are located at 5 holes 0.6 klb. on the right and left sides of the muzzle brake with an interval of 0.6 klb., which creates a uniform decrease in pressure in the chamber of the muzzle brake, smoother outflow of gases and helps to reduce dynamic impact, increase firing efficiency. The hole arrangement, the optimal diameter and spacing option reduce the physical load on the fighter’s arms during firing and create good controllability with weapons.

 When the bullet exits the bullet hole 25, the resulting vortex flow draws air through the holes 23 and extinguishes the flame in the chamber of the muzzle brake 26, acting as a flame arrester.

 Thus, the presented muzzle brake performs simultaneously the functions of a muzzle brake, a compensator-flame arrester, a bracket when installing a bayonet-knife, and also solves the problem of installing a quick-release muffler without disconnecting the muzzle brake.

Technical characteristics of the inventive assault rifle with grenade launcher design Sitov:
Caliber (mm) - 7.62 + 40
Weight (kg) - 4.1
The total length of the machine (mm) - 740
The length of the barrel of the machine (mm) - 450
Effective firing range of the machine (m) - 650
Rate of machine gun firing (rds / min) - 650
Grenade launcher combat rate of fire (rds / min) - 5-6
Muzzle velocity (m / s) - 730
Magazine capacity (cartridges) - 35r

Claims (1)

 A submachine-gun grenade launcher having a barrel, a receiver, a gas mechanism tube, an ammunition magazine installation window, an ammunition magazine, a muzzle brake, a front sight, a common firing handle for the machine gun and grenade launcher, characterized in that the magazine has a window for installing the magazine with ammunition it is made with a plastic casing, the muzzle brake is additionally a compensator-flame arrester and is made in the form of a body with a gas chamber, on the side of the muzzle brake from the sides there are 5 openings of size 0.6 gauge rum with 0.6 gauge intervals and axial grooves with hemispherical nests.

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