MUZZLE ADAPTER FOR GUN Russian patent published in 2015 - IPC F41A21/32 

FIELD: ammunition.

SUBSTANCE: claimed device comprises the barrel with receiver fitted thereon. Symmetric four inlet holes are made nearby gun barrel edge, in the barrel body, their total area equals at least the barrel bore cross-section area. Nozzles are made in the barrel body nearby the receiver rear wall. The filter is arranged above the nozzles on the barrel outer surface. Valve gear is arranged above the inlets on the barrel outer surface. Muzzle brake is arranged at the gun barrel end and provided with two cylindrical bores. The latter are turned through 90 degrees to the barrel bore lengthwise axis and located in the plane parallel with the earth surface. Receiver volume makes at least j of the gun barrel bore volume at the receiver OD not exceeding two diameters of the gun bore nearby muzzle edge. Total area of cross-section of bores for gas release from muzzle brake sideways makes at least half the area of barrel bore cross-section while bore length-to-diameter ratio makes at least 1.5.

EFFECT: reduced pressure at muzzle edge.

2 cl, 1 tbl, 1 dwg