MANUFACTURER: Crimson Trace FAMILY: Accessories MODEL: Rail Master TYPE: Accessory-Lasers and Sights FINISH: Black FINISH TYPE: Black WEIGHT: 4.1 oz. (w/Batteries) SHIPPING WEIGHT: 0.35 lbs. ADDL INFO: Fits Most M1913 Pic Rails ADDL INFO: 400Lumen LED Light|Red Laser ADDL INFO: Uses CR123 Batteries MFG MODEL NO: 01-7730