| 摘要 |
<p>Improved semi-automatic shotgun of the type comprising a magazine tube (8), around which is arranged a cylinder (9), the interior of which is in communication with the interior of the barrel (2) and, in this cylinder (9) and around the magazine tube (8), on the one hand, a piston (10) displaceable under the effect of some of the propellant gases and capable of cooperating with a sleeve (12) provided with a rod (13) capable of subjecting all the movable parts (14) to stress and, on the other hand, a regulating or pressure-relief valve (11), springs (17-42) being provided for controlling the return of the sleeve (12) and of the regulating valve (11), characterised in that the regulating valve (11) is located in the piston assembly (10). <IMAGE></p> |
