Solofish 800 Lumens Pistol Light Laser Combo, Strobe & Memory Function for Green/Red/Blue Laser and Tactical Light with Slidable Rail Fits Full Size Guns w/RailFit Guns w RailSlidable rail offers your the best postion freely. Also makes the pistol laser light combo be compatible with Glocks w a rail. Strobe & Memory FunctionStrobe function for both Green red Blue laser and gun light with Memory Function, which can keep your last setting. Double press to chose the Strobe modes. The bright & adjustable green laser output is <5mW, the class is IIIA. The laser beam distance is about 200 meters day; 2000 meters