The VG6 Gamma is a muzzle brake and compensator hybrid that virtually eliminates recoil and minimizes muzzle movement. Its unique chamber geometries give it a very soft feel in the shoulder, and the gas ports' dimensions have been strenuously tested to give the utmost control to the muzzle. This model is constructed of 17-4 stainless steel with a bead blast finish, 5/8x24" RH threads and includes the crush washer. It is compatible with 6.5 Creedmoor, 6.5 Grendel, 6.8 Remington SPC calibers. Anti-seize grease recommended for installation.