Surefire

Support Your Legacy. The FH556-215A is a high-performance four-prong flash hider for the Colt Commando, M4, M16, HK416, and to other 5.56 mm (.223 cal.) semi-auto, bolt-action, or assault rifles with Mil-Spec 1/2-28 muzzle threads. It also serves as a precision, rock-solid adapter mount that enables rapid, no-tools attachment of SureFire FA556K, FA556-212, FA556MG, or MINI, suppressors to these rifles or to other rifles with the same muzzle thread/configuration. Machined from heat-treated stainless steel and finished in a tough, corrosion-resistant coating, it delivers the high performance and durability that created a legacy.