FIRE AUTOMATIC WEAPONS Russian patent published in 2017 - IPC F41A3/00 

FIELD: weapons and ammunition.

SUBSTANCE: fire automatic weapons contain a barrel, a barrel extension, a two-piece bolt carrier, a gas seal stand with a gas seal, a return mechanism. The gas seal stand with a gas seal is movably mounted in the longitudinal guides of the upper part of the shutter frame, and the necessary position of the gas seal stand on the supply line is provided by the protrusion on the barrel extension and by the spring of the stand that presses the gas seal stand to the protrusion of the barrel extension.

EFFECT: increased reliability of automation.

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