Designed to fit AR-15 and M16 barrels, the BCM low-profile gas block is machined from high quality steel to Mil-Spec tolerances. Gas block includes set screws for mounting and a phosphate finish for corrosion and wear resistance. Available with either .625" or .750" inside diameter.

SPECS: Machined steel, phosphate finish. 1.34" high, (3.4cm), 1" long (2.5cm). Includes set screws for mounting.