Durable, black, polycarbonate mag well is oversized and ultra smooth on the inside for easy, friction-free magazine insertion. Easy-to-install, drop-in unit clamps together with three hex screws and makes it possible to change magazines without ever taking your eyes off your target! Black, matte finish matches most AR-15s. Mfg: Arredondo SPECS: Polycarbonate, black, matte finish. Approximately 3-11/16" (9.4cm) wide, 11-5/16" (2.4cm) tall. 2.4 oz. (68 g) wt.