MODULAR MULTI-CALIBER SMALL ARMS Russian patent published in 2024 - IPC F41C7/00 

FIELD: weapons and ammunition.

SUBSTANCE: modular multi-caliber small arms comprises a receiver assembly, three barrel modules, a receiver cover, a butt, a fore-end with a "Picatinny rail", two bolts assembled, a return mechanism, magazine, pistol grip, muzzle brake-compensator, contactor. Barrel modules have length: 510 mm with caliber 7.62×39 mm, 415 mm with caliber 5.45×39 mm and 320 mm with caliber 7.62×39 mm, which are fixed in the receiver due to the movable contactor. Assembled bolts have diameter of bolt cup 11.45 mm for caliber 7.62×39 mm and 10.1 mm for caliber 5.45×39 mm. Receiver has a hole on the right side for extension of the contactor. Muzzle brake-compensator and a gas chamber are rigidly fixed on the barrels modules, on which gas tube and foresight base are fixed. Barrel modules have a mounting slot for a contactor on the breech end.

EFFECT: modular multi-caliber small arms are proposed.

1 cl, 8 dwg