Rifle

Abstract

A rifle with an auto-loading mechanism having a gas chamber with a guiding tube connected to a gas adapter, and a piston assembly including an impact damper, a piston slidingly movable within the gas chamber, a guide fixed to the piston at one end and provided at its other end with a blind hole, a fixed piston slidingly movable at one end within the blind hole of the guide and fixed to the impact damper at the other end, a helical spring arranged within the blind hole of the guide and a return helical spring arranged around the guide in a way to lean against a stop in the guiding sleeve with one end and against the impact damper with the other end, wherein the gas chamber is arranged on the rifle barrel in the area of the barrel receiver. The advantage of the rifle lies in that it allows for more accurate shooting, has lower weight and less recoils.

Claims

1. A rifle comprising: a housing assembly comprising an upper and a bottom housing portion, a breech mechanism assembly arranged within the housing assembly and comprising a bolt carrier assembly which further comprises a bolt carrier and a guiding sleeve fixed in the upper portion of the bolt carrier, a bolt arranged in the bottom portion of the bolt carrier, a guiding pin arranged through the central portion of the bolt carrier, and a barrel receiver, a rifle barrel screwed into the barrel receiver and comprising a gas adapter at the distal end of the rifle barrel, and a self-loading mechanism comprising a gas chamber with a guiding tube connected to the gas adapter, and a piston assembly comprising an impact damper fixed within the housing assembly, a piston slidingly movable within the gas chamber, a guide fixed to the piston at one end and a return helical spring arranged around the guide in a way to lean against a stop in the guiding sleeve with one end and against the impact damper with the other end, characterized in that the guide is provided at its other end in the longitudinal direction of the guide with a blind hole, and the piston assembly further comprises a fixed piston slidingly movable at one end within the blind hole of the guide and fixed to the impact damper at the other end, a helical spring arranged within the blind hole of the guide in a way to lean against the bottom of the blind hole of the guide with one end and connected to the fixed piston with the other end, wherein the gas chamber is arranged on the rifle barrel in the area of the barrel receiver.

2. The rifle according to claim 1, characterized in that the upper and the bottom housing portions are connected by means of a dovetail.

3. The rifle according to claim 1, characterized in that the guide is formed with a cavity in the region of connection with the piston.

4. The rifle according to claim 1, characterized in that the gas chamber is arranged on the rifle barrel by means of a barrel nut, on which it is mounted.

5. The rifle according to claim 4, characterized in that the barrel nut is mounted onto the barrel receiver.

6. The rifle according to claim 4, characterized in that the position of the gas chamber is fixed on the barrel nut by means of a safety nut.

7. The rifle according to claim 1, characterized in that in the bottom housing portion, steel rails are arranged in the longitudinal direction of the rifle, which are fixed in the bottom housing portion by means of pins.

8. The rifle according to claim 1, characterized in that the fixed piston of the piston assembly is fixed in the impact damper by means of a first pin.

9. The rifle according to claim 1, characterized in that the guiding sleeve is fixed within the bolt carrier by means of a second pin.

Description

(1) FIG. 1: Rifle in side view

(2) FIG. 2: Assembly of a housing with a barrel in side view

(3) FIG. 3: Assembly of a housing with a barrel in top view

(4) FIG. 4: Breech mechanism assembly with a barrel in side view

(5) FIG. 5: Breech mechanism assembly with a barrel in cross-section

(6) FIG. 6: Breech mechanism assembly without a barrel in cross-section

(7) FIG. 7: Piston assembly in cross-section

(8) FIG. 8: Rifle in cross-section

LIST OF REFERENCE NUMERALS

(9) 1 rifle 2 butt 4 handguard 5 rifle barrel 7 cavity 9 accessory mounting bracket 10 rifle housing assembly 10a upper housing part 10b bottom housing part 11 gas chamber 12 guide tube 13 gas adapter 15 barrel nut 16 barrel receiver 17 guiding sleeve 18 bolt carrier 19 guiding pin 20 piston assembly 21 impact damper 22 first pin 24 return helical spring 26 fixed piston 27 helical spring 28 second pin 29 guide 30 bolt carrier assembly 31 blind hole 32 piston 38 firing pin 40 bolt 41 steel rail 43 safety nut

(10) The invention is described in more detail in the following.

(11) The technical problem is solved with a rifle 1 comprising at least:

(12) a housing assembly 10 comprising an upper 10a and a bottom housing portion 10b, a breech mechanism assembly arranged within the housing assembly 10 and comprising a bolt carrier assembly 30 which further comprises a bolt carrier 18 and a guiding sleeve 17 fixed in the upper portion of the bolt carrier, a bolt 40 arranged in the bottom portion of the bolt carrier, a guiding pin 19 arranged through the central portion of the bolt carrier, and a barrel receiver 16,
a rifle barrel 5 screwed into the barrel receiver 16 and comprising a gas adapter 13 at the distal end of the rifle barrel 5,
and a self-loading mechanism comprising a gas chamber 11 with a guiding tube 12 connected to the gas adapter 13, and a piston assembly 20 comprising an impact damper 21 fixed within the housing assembly 10, a piston 32 slidingly movable within the gas chamber 11, a guide 29 fixed to the piston 32 at one end and provided at its other end in the longitudinal direction of the guide with a blind hole 31, a fixed piston 26 slidingly movable at one end within the blind hole 31 of the guide and fixed to the impact damper 21 at the other end, a helical spring 27 arranged within the blind hole 31 of the guide in a way to lean against the bottom of the blind hole of the guide with one end and connected to the fixed piston 26 with its other end and a return helical spring 24 arranged around the guide 29 in a way to lean against a stop in the guiding sleeve 17 with one end and against the impact damper 21 with the other end,
wherein the gas chamber 11 is arranged on the rifle barrel 5 in the area of the barrel receiver 16.

(13) In the region where the piston 32 is fastened, the guide 29 is formed with a cavity 7 that reduces the weight of the piston assembly 20.

(14) The fixed piston 26 of the piston assembly may be fixed in the impact damper 21 by means of a first pin 22.

(15) The guiding sleeve 17 may be fixed within the bolt carrier 18 by means of a second pin 28 that fixes the position of the guiding sleeve within the bolt carrier.

(16) The gas chamber 11 can be arranged on the rifle barrel by means of a barrel nut 15, on which it is mounted. The barrel nut 15 is mounted onto the barrel receiver 16. The position of the gas chamber 11 may be fixed on the barrel nut by means of a safety nut 43.

(17) When using the rifle, the user pulls the trigger, thereby activating a hammer which strikes a firing pin 38 which in turn hits a primer, thereby causing the ignition of the gunpowder in the cartridge. High-pressure propellant gases propel the bullet toward the rifle muzzle. As the bullet passes the gas adapter 13, the pressurized propellant gases expand through the guide tube 12 into the gas chamber 11. Propellant gases push back the piston 32 together with the guide 29 and the breech mechanism assembly. The helical spring 27 and the return helical spring 24 become tensioned. When the pressure within the gas chamber 11 is released, the helical spring 27 pushes the guide 29 together with the piston 32 forward to the starting position, while the movement of the breech mechanism assembly backwards persists until the bolt 40 extracts the cartridge case from the barrel. Once the cartridge case is ejected from the rifle, the return helical spring 24 returns the breech mechanism assembly to its original position, with the bolt 40 pushing a new cartridge into the rifle barrel 5.

(18) The housing assembly 10 comprises a bottom housing portion 10b and an upper housing portion 10a, said portions being connected by a dovetail. The housing is made of an aluminium material. In the bottom portion of the housing, steel rails 41 are arranged in the longitudinal direction of the rifle, which are fixed in the bottom part of the housing by means of standardized pins. The steel rails guide the bolt carrier 18. The steel rails are wear-resistant and provide good guiding of the bolt carrier and reliable operation of the ejection mechanism. The modular housing allows for the replacement of the upper housing portion by different lengths of rifle accessory mounting brackets, such as binoculars, sights, laser equipment, lights, etc.

(19) The rifle can further comprise a butt 2 that is connected with the housing assembly 10. The rifle can further comprise a handguard 4.