The Crimson Trace CMR-201 Rail Master Universal Laser Sight is a versatile and powerful laser sight designed to fit rail-equipped pistols, rifles, and shotguns. Utilizing Crimson Trace's Secure-Lock Technology, the Rail Master locks onto Picatinny M1913 or Weaver-style accessory rails, ensuring stability under recoil. Featuring ambidextrous Instant Activation and a 5-minute auto-shutoff to conserve battery life, the CMR-201 includes four inserts to adapt to various firearm platforms. With a 5mW red laser and over four hours of runtime on a single 1/3N Lithium battery, this laser sight offers precision and reliability. Crimson Trace Rail Master Universal Rail Mount Red Laser Sight 01-9690-1