FIELD: firearms. SUBSTANCE: proposed weapon has barrel and loading chamber. Loading chamber has two inlet windows closed by sliding bolts. Each sliding bolt has longitudinal hole and feeding duct going into this hole. Needle carrying piston is installed in hole for movement. Piston is positioned ahead of outlet of feeding duct to longitudinal hole of bolt. Additional bolt with through longitudinal gas-feeding duct in the form of nozzle is mounted across inlet to bore for movement and feeding of projectile into bore. Blade with pusher can be mounted in rear wall of loading chamber between inlet windows for movement into loading chamber. Ignition devices can be installed in wall of additional bolt with outlet to start of gas-feeding duct and in rear wall of loading chamber. EFFECT: enhanced functional reliability.
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