PNEUMATIC RIFLE Russian patent published in 2010 - IPC F41B11/14 

FIELD: weapons and ammunition.

SUBSTANCE: proposed rifle comprises barrel, receiver with compression chamber, firing spring and piston, housing with bypass channel communicated with the barrel tail end and compression chamber. Housing accommodates pneumatic lock made up of interconnected two different-section pistons and driving spring. Note that the latter allows adjusting its compression ratio. Smaller-diametre piston communicates with compression chamber and bypass channel, while larger-diametre piston communicates with bypass channel and working medium. Receiver incorporates check valve that acts towards compression chamber.

EFFECT: higher power of shot, reduced impact of piston on receiver surface, higher accuracy of hits.

3 cl, 5 dwg