Wilson's Accu-Tac AR flash hider sports a three-pronged external profile and our exclusive external accurizing flutes that improve muzzle harmonics over other blast dispersing brakes. It features effectively dissipate flash and minimize muzzle signature but unlike many competitive AR muzzle devices, the Accu-Tac has no negative impact on accuracy. It is constructed of hardened 4140 steel and fits standard, GI threaded AR barrels.