FIELD: fire arms; control of barrel geometry.
SUBSTANCE: fire arms are provided with at least two barrels interconnected by means of strip not reaching the muzzle; front parts of barrels are convergent for separation at application of force; strip is secured on one of barrels practically to its muzzle and is located at distance from second barrel; second barrel is surrounded with ring in its front part deflecting it due to elastic deformation; fitted on front end of second barrel is clip whose element is located along strip and is engageable with strip directly or through spacer.
EFFECT: facilitated procedure of geometry control.
14 cl, 12 dwg
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