This Quick Detach (QD) flash hider muzzle device will allow a shooter to utilize any of the R556, R556A1, R556A2, R30A1, or R30A2 suppressors on weapons that have 5/8×24 muzzle threads. Featuring a birdcage-style flash hider, a taper mounting surface, and a ratcheting secondary retention system, this QD flash hider muzzle device will ensure precise and repeatable performance from your suppressor. Constructed of heat-treated Chromoly Steel with OXyN gas nitride finish.