NOISELESS CASE-FREE CARTRIDGE Russian patent published in 2013 - IPC F42B5/00 F42B5/18 

FIELD: weapons and ammunition.

SUBSTANCE: cartridge comprises a bullet, a piston and a cap. The piston-bullet is made with an outer collar arranged on its rear part. At the outer side of the piston-bullet there is a cylinder installed with a charge, a cap and an inner collar. The cap is installed in the case bottom. The inner collar is made on the cut of the cylinder. The inner diameter of the piston-bullet collar is more than the inner diameter of the cylinder collar.

EFFECT: improved compactness of a noiseless cartridge.

1 dwg