FIELD: weapons and ammunition.
SUBSTANCE: claimed automatic gun with locking system composed of top and bottom bolts with racks engaged by the gear. Breech frame houses two piston compressors with intake and discharge valves. One of the compressor cylinder is arranged at breech frame rear while another one is located at its front, inside breech frame cover. Compressors pistons are secured at the ends of top and bottom bolt racks while return spring is arranged above the barrel. At long-term and high-intensity fire air plus coolant can be fed into barrel bore from the vessel located in the butt-stock by injector.
EFFECT: reliable forced cooling, decreased recoil pulse, decreased gun weight.
2 cl, 2 dwg
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