The Crimson Trace RailLight is the next generation in pistol mounted lights. Made of Aerospace Aluminum, with no exposed fasteners in a snag-free design, you will be hard pressed to find a better option. Our downward facing Red LED Walking Light will allow maneuvering without affecting your vision at night if needed. The Red LED Walking Light is independently enabled/disabled at the users discretion and is activated using CT Motion "shake to wake" functionality. Memory retention, remembers the last used setting.