SUBCALIBER BARREL Russian patent published in 2001 - IPC

FIELD: firearm, in particular, subcaliber barrels for subcaliber firing. SUBSTANCE: the subcaliber adjusting device has a tapered split bush, internal and external eccentric bushes that successively envelop the barrel tubular casing and have grooves on the front ends for their turning relative to the tubular casing, whose muzzle end is threaded. The tapered split bush is installed on the thread, the bush is made with a female cylindrical and male taper threads with a similar pitch. The internal eccentric bush with a female taper thread is screwed on the taper split bush. The positions of the internal and external eccentric bushes are fixed by a washer and nut installed in the tubular casing. EFFECT: simplified process of adjustment, matched sighting and hitting points both from the subcaliber barrel and the barrel in which it is inserted. 2 dwg