| 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. The invention relates to the semi-automatic firearms comprising the 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 (5), hand stock (16), barrel cap (17) and barrel (18) characterized in that said firearms comprise, in order to enable the formation of a structure where it is not needed to use different pistons (7) according to the cartridges with different weights likely to be used and where the kickback force is reduced,
the valve piston (5) connected with the piston (7) between the gas tube (10) and magazine tube (9) and the hand stock nut (1) by means of which the kickback force and the force by which the piston (7) operates the mechanism (11) are adjusted according to the weight of the cartridge, the discharge holes (20) through which the gas is discharged as the valve piston (5) positioned on the valve piston positioning surface (21) in the magazine plug (8) moves within said bracket (6) during the backward movement of the barrel (18), at the time the barrel structure (19) is moving backwards under the force formed at the instant of explosion resulting from the firing of the cartridge. |
