MUZZLE ATTACHMENT Russian patent published in 2000 - IPC

FIELD: hunting weapon, in particular, muzzle caps and check attachments. SUBSTANCE: muzzle attachment "paradox" screwed on the hunting gun barrel has smooth cylindrical and rifled parts in its bore. The smooth part l ≥ Δd/tgα long, where: Δd - the value of the gap between the attachment smooth part and the gun barrel, α - the preset angle of misalignment, has a lug for stop against the barrel made with a chamfer at an angle of 60 deg., and the rifled part consists of three conjugated sections: a section with straight grooves with a length of at least 0.6 caliber, a section with grooves of variable steepness with a length of at least 1.8 caliber, and a section with grooves of permanent steepness equal to the maximum steepness of the previous one with a length of at least 3.6 caliber. EFFECT: enhanced close grouping of shots at firing from one-barrelled gun. 2 cl, 2 dwg