AUTOMATIC GUN Russian patent published in 2010 - IPC F41C7/00 F41A5/22 

FIELD: weapons and ammunition.

SUBSTANCE: proposed automatic gun comprises gas extraction assembly, barrel, breech frame, gas extraction unit, gas extraction tube and breech frame with breech block. Said gas extraction tube features variable cross section and ratio between diametres of front and rear parts making at least 3:1. Gas chamber accommodates vertically travelling valve with two pistons, area of top piston making at least that of bottom piston. Breech frame front edge has a hook with two ledges, one in contact with the valve in its top position to lock breech frame recoil and another in contact with the ledge made on the valve top surface to move said valve to its top position from its bottom position.

EFFECT: higher reliability of operation of automatic devices, higher accuracy of hits.

1 dwg