Slim, low-profile replacement for factory front sight gas block provides maximum clearance for optics and free-float handguards. Streamlined profile reduces forward weight and improves your rifle’s appearance. Set screws, gas tube mounting pin, and installation instructions included. Mk 12 is an exact copy of the gas manifold on the Mk12 Mod 1 and Mk 18 Mod 1 Special Purpose Rifles used by the U.S. Army and Navy. Made from 416 stainless steel with a tough, wear-resistant black oxide finish, and fits barrels with .750" O.D. Mk 12 Style in natural stainless, has the same low profile as the Mk12 Mod 1 gas manifold, and fits barrels with .875" O.D.

SPECS: 416 stainless steel. Mk 12 fits .750” (19mm) O.D. barrels. Black finish. 1" (25.4mm) long, 7?8" (22.2mm) wide, 1-7?16" (36.5cm) high. Mk 12 Style fits .875” (22.2mm) O.D. barrels. Natural silver finish. 1" (25.4mm) long, 1" wide, 1-7?16" high.