FIELD: weapons and ammunition.
SUBSTANCE: invention refers to firearms. Firearm device can be user-modified, namely, firearm barrel can be replaced by the user. The firearm device includes breech box, bolt with fire ledges, barrel block that can be detached from or attached to the breech box by user and includes barrel and lock. Internal part of the barrel has a hollow channel shape with for cartridge to be shot, cartridge chamber and ammunition outlet hole. Internal shape of lock matches fire ledge shape of the bolt, and external lock shape includes rear cone pointing back and matching breech box cone, and front cone pointing forward and matching the cone of centring sleeve. Rotating clamping sleeve is attached to the centring sleeve.
EFFECT: accuracy of rifled firearms with removable barrel.
14 cl, 8 dwg
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