FIREARMS WITH MOVABLE BARREL Russian patent published in 2012 - IPC F41A21/32 F41A21/36 

FIELD: weapons and ammunition.

SUBSTANCE: firearms with a movable barrel comprises a barrel receiver (1), a barrel coupling (2), fixed in the barrel receiver (1), a barrel (3) movably installed in the barrel coupling (2) and the barrel receiver (1). A support bushing (4), a barrel spring (5), a friction coupling (6) are placed onto the barrel and fixed with a barrel nut (7) on the barrel. Fixation of the barrel (3) and its components is carried out with a nut (8) of the barrel coupling. The friction coupling (6) is arranged in the form of a bushing, having inclined slots (9) on the external surface, and the barrel coupling (2) has responsive journals (10) entering inclined slots (9) of the friction coupling (6). The barrel spring (5) is placed between the support bushing (4) and the friction coupling (6).

EFFECT: improved fire accuracy, higher combat effectiveness of weapons.

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