Crimson Trace LG-350G is green laser grips that fits Smith & Wesson Round Butt revolvers. More specifically, This laser fits Airlight, Airweight, Bodyguard, Chief’s Special, Centennial, Ladysmith, Models 36, 37, 38, 49, 60, 63, 317, 331, 332, 337, 340 342, 351, 360, 442, 637, 638, 640, 642, 649, 651 & 940. Material made of Polymer & Rubber. Factory adjusted for 50 feet. User adjustable windage & elevation. Instinctive Activation – Front. Battery life 2 hours. Get your Crimson Trace Laser today!