| 摘要 |
The invention relates to a semi-automatic firearm comprising a hand stock nut (1), bracket (6), piston (7), magazine tube plug (8), magazine tube (9), gas tube (10), mechanism (11), lock bolt (12), body (13), lock (14); bolt arm (15), hand stock (16), barrel cap (17) and barrel (18). In order to enable the use of cartridges with different loads and to reduce the recoil, said firearm comprises a valve piston (5) connected with the piston (7) between the gas tube (10) and magazine tube (9) and the hand stock nut (1). Depending on the pressure generated by the cartridge the valve piston (5) is able to release excess gas through discharge holes (20). |
| 主权项 |
1. A semi-automatic firearm comprising a hand stock nut (1), a bracket (6), a piston (7), a magazine tube plug (8), a magazine tube (9), a gas tube (10), a mechanism (11), a lock bolt (12), a body (13), a lock (14), a bolt arm (15), a hand stock (16), a barrel cap (17), a barrel (18), wherein the barrel (18) and the bracket (6) are in fluid communication by a bracket gas hole (23), which feeds into the bracket (6) behind
a valve piston (5), wherein the hand stock nut (1) is adjustably coupled to the magazine tube plug (8) such that the hand stock nut (1) can be used to adjust the kickback force and the force by which the piston (7) operates the mechanism (11) according to the weight of the cartridge, and discharge holes (20) through which gas passing from the barrel (18) through the bracket gas hole (23) is discharged from the bracket (8) once the valve piston (5) positioned on a valve piston positioning surface (21) of the magazine plug (8) moves forward within said bracket (6) under the force formed when a cartridge in the barrel structure (19) is fired, wherein the discharge holes (20) are sealed to the bracket gas hole (23) when the valve piston (5) is in a resting position, wherein the discharge holes (20) are positioned on the bracket (6) within which the piston (7) and the valve piston (5) are located. |
