Crimson Trace's MTL (Modular Tactical Laser) provides quick target acquisition on any rail-equipped long gun. The MTL can be mounted in virtually any location, and is low profile to free up space for other accessories like lights and grips. It features a 6" remote tail switch with momentary on/off activation. Additionally, the MTL is IPX4 water resistant, and has a 2 hour run time. Features: Low profile6" remote switchMomentary on/off activation IPX4 water resistant2 hour run time Crimson Trace Rail Master MTL Modular Tactical Laser 01-3000193