This Quick Detach (QD) flash hider muzzle device allows a shooter to utilize any of the R556, R556A1, R556A2, R30A1, or R30A2 suppressors on firearms with 1/2x28 muzzle threads. Featuring a birdcage-style flash hider and a taper mounting surface, it ensures precise and repeatable performance from your suppressor.Constructed from heat-treated Chromoly Steel with an OXyN gas nitride finish, this QD flash hider is built for durability.