AUTOMATIC FIREARM Russian patent published in 2015 - IPC F41A21/12 F41C7/00 

FIELD: weapons and ammunition.

SUBSTANCE: device comprises the automation system with inertial locking the bore, while in the barrel there is a recessed chamber for ammunition, which is the barrel section recessed into the barrel for fixed placement of ammunition before firing. To reduce the weight of the breechblock, as well as to facilitate removal of the sleeve a gas cylinder of the chamber is provided, located at the outlet of the breech end of the barrel behind the recessed chamber. The gas cylinder provides location of the breechblock bolt before firing and moving the breechblock bolt and the sleeve under conditions of operating pressure of powder gases during firing to complete release of the sleeve from the breech end of the barrel. Also the recessed chamber is provided with gas channels communicating with the bore and with the said gas cylinder of the chamber, ensuring flow of powder gases when firing through the chamber into the gas cylinder of the chamber.

EFFECT: weight reduction of movable parts of the automation to prevent significant deformation of the sleeve when firing and its free removal without jamming or swelling, or rupture.

8 cl, 6 dwg