Brownells AR-15 Modular Gas Block Kit 0.750 in Black

Easy-to-install gas block features an integral fixed rail and a modular design that allows fast installation and removal of up to three, additional Picatinny rails for mounting lasers, lights, night vision optics, back-up sights, and a variety of other tactical accessories. Side and bottom rails attach easily with two screws, so you can configure the unit for each mission's requirements. Precision-machined from rugged, 6061 billet aluminum for superior strength without weighing down your weapon. Mounts securely to barrel with three, hardened steel setscrews. Mfg: Brownells SPECS: Aluminum, matte black, hardcoat anodized finish. Fits standard .750" (19mm) dia. barrels. Gas Block - 1-7/8" (4.8cm) long, 1" (2.5cm) wide, 1-7/16" (3.6cm) high. Gas Block Kit - Includes modular gas block with three add-on rails. 1-7/8" long, 2