Semi-automatic gun

Details Semi-automatic gun Semi-automatic gun

1976-10-13

1978-08-29

Bentley, Stephen C.

Ordnance

Automatic

Gas piston type

F41D 504

Patent

active

041095588

ABSTRACT:
A semi-automatic gun having a gas operated device for actuating a reloading mechanism thereof. The reloading mechanism includes a cartridge magazine which extends parallel to the gun and the actuating device includes an annular piston sliding over the cartridge magazine in an annular chamber defined between the cartridge magazine and a cylinder, closed at one end, which surrounds a portion of the cartridge magazine. Gas transfer ducts convey gas from the interior of the barrel of the gun, through the wall of the cylinder into the annular chamber defined thereby. The annular piston has a peripheral groove therein at a position adjacent the gas transfer ducts so that gas entering the annular chamber impinges on the piston and not on the wall of the cartridge magazine; subsequently these gases transfer to a lower chamber between the end of the piston and the closed end of the annular chamber along a passage between the piston and the wall of the chamber itself.

REFERENCES:
patent: 3810412 (1974-05-01), Zamacola

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