Rifle

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.