The Crimson Trace CMR-206 Rail Master Universal Green Laser Sight is a compact, rail-mounted laser designed for use on pistols, rifles, and shotguns equipped with Picatinny or Weaver accessory rails. It emits a 5 mW Class 3R green laser (515–532 nm) that is visible under a wide range of lighting conditions, with a dot size of approximately 0.5 inches at 50 feet and a factory-sighted range of 50 feet. The unit operates on a single 1/3N lithium battery, providing over 2 hours of continuous runtime, and includes a 5-minute auto-shutoff feature to conserve power. Constructed with a lightweight polymer housing, it mounts securely using integrated rail inserts and features ambidextrous control tabs for activation, along with multiple operating modes including momentary, strobe, and constant-on. Windage and elevation are user-adjustable for zeroing, and the system is designed for quick installation and consistent retention under recoil.