Modeled after the popular AK-74 muzzle brake, this screw on compensator is designed to easily attach to the standard AR15 barrel equipped with standard 1/2x28 threads.Specifications:Length: 3.25”N.W. (OZ): 5.5Fits: AR15/M16/M4 w/ 1/2x28 threadsHeat treatedErosion resistantReduces muzzle climb and recoil.Finish: Black oxideSteel