Three equally-spaced horizontal prongs efficiently reduce muzzle flash to help minimize the blinding effect of the flash on the shooter in low-light conditions. Short OAL and flat, smooth muzzle face with rounded edges prevents hang-ups and aids in unencumbered weapon deployment. Precision machined from heat-treated steel and finished with AA's proprietary SCARmor™ coating that gives high surface hardness for added resistance to blast erosion.  51T models have an integral 51-tooth ratchet mount that accepts Advanced Armament sound suppressors. All models are available in sizes to fit rifles chambered in 5.56mm/.223 (1/2"-28 tpi muzzle threads)