A familiar name to law enforcement but new to the world of lights is Leupold. The company's modular MX Series allows you to build a light to fit your needs. Choose a two- or three-cell main tube, xenon or LED bulbs, multiple or single function bezel with a constant on or momentary tail cap. All the parts are manufactured from T6061 aerospace-grade aluminum and the seals are waterproof to four atmospheres. The light used the two-cell CR123A body and the tactical MX400 bezel. This gives you a dim light, bright, strobe, or blinking option in a handheld unit. Leupold installs a heavy-duty clip and a lanyard so you can maintain possession of your light even when doing reloads or other activities that require two hands.