Patent ID: 11933574
Assignee: SAVAGE ARMS, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. A semiautomatic shotgun comprising:
a receiver defining a receiver interior;
a breech block positioned in the receiver interior, the breech block having an in-battery position and an open position;
a barrel attached to a forward portion of the receiver, the barrel having a barrel wall extending forwardly from the receiver, the barrel wall defining a barrel bore with a barrel axis;
a piston and a piston cylinder defining a piston chamber, the piston chamber being fluidly connected to the barrel bore and the piston being operatively coupled to the breech block by a slider abutting against the piston, the slider operatively connecting with the breech for selectively moving the breech block between the in-battery position and the open position; and
pressure regulation fluidly connected to the piston chamber;
wherein there is only a single piston connecting to the breech block and the single piston is an annular piston positioned on a magazine tube and the slider is slidingly positioned on the magazine tube.