Surefire FH215A Flash Hider and Suppressor Adapter
The FH556-215A is a high-performance 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.
The end of this adapter has open prongs.
SureFire flash hiders deliver superior muzzle flash suppression. This provides three benefits—minimizing degradation of your night-adapted vision, helping to conceal your position, and reducing muzzle rise. Machined from heat-treated stainless steel, finished in a tough, corrosion-resistant coating, all SureFire flash hiders are extremely resistant to gas and particle erosion and will perform perfectly for thousands of rounds.