This Universal Gun Flashlight can be installed on any picatinny rail and most weaver rails. It utilizes a spring compression system, so it is easily mounted or detached on any firearm by simply compressing the spring, sliding it on the rail to the desired location, and releasing the spring. The LED in this flashlight has a 150 lumen output. Constructed out of high-grade aluminum, designed to fit most full-size hand-guns with a rail and comes with 3 additional lense colors: red, blue, and yellow.