The high-quality SAM7SF-84G AK-style semi-automatic rifle from Arsenal Inc. sports unique features ... Polish AK-47 parts kit used ... supports a removable one-piece AK-74-style muzzle brake.

PICATINNY ARSENAL, N.J. -- Engineers from Watervliet Arsenal have designed a 105 mm low blast overpressure muzzle brake, or LBOP. It's the first large caliber muzzle brake designed specifically ...