SPECS: Reinforced polymer body and anodized aluminum lens assembly, black. 2¾” (7cm) long, 11⁄8" (2.9cm) wide, 1½” (3.8cm) high from top of rail clamp to bottom of housing. 2.4 oz. (67g) weight with battery. Fits MIL-STD 1913 Picatinny rail, and includes five rail keys to allow installation on Beretta 90-Two and Vertec, Glock, Kel-Tec PF-9, Kimber TLE/RLII, Sig GSR, Smith & Wesson M&P and TSW, Springfield XD compact and full frame, Springfield 1911, and others.