The 660L is universal because it can be attached to virtually any long gun rifle, shotgun, or submachine gun. Features a recoil-proof LED that generates 120 lumens of brilliant white light in an optimal beam pattern. The included mount includes a tube clamp that attaches the 660L directly to rifle barrels, magazine tubes, or gas tubes from .5" to .9" in diameter. The tailcap assembly includes two switches: a click-type pushbutton switch (press for momentary-on, press further to click constant-on) and a pressure-activated tape switch (press for momentary-on) with a 7-inch cable, which can be attached where desired using its self-stick Velcro pad.