The revolutionary SureFire WARCOMP-556-1/2-28 flash hider, which fits M4 / M16 weapons and variants with A 1/2-28 muzzle threads, is the world's most shootable flash hider. Its patent-pending design provides three valuable functions: It provides over 99% reduction in muzzle flash compared to a plain muzzle, which helps to conceal the shooter's location and preserve his dark-adapted vision. It virtually eliminates muzzle rise, which enhances monitoring of target reaction and staying on target for faster follow-up shots. It serves as a rock-solid mounting adapter for all SureFire SOCOM Series 5.56mm Fast-AttachA(R) suppressors, including our SOCOM556-RC model, Mfg: Surefire