- The RRL is designed to quickly and easily mount to any Picatinny/1913 or light rail of most modern handguns and rifles. The RRL can disengage effortlessly, be used on or off a gun and can easily fit into a pocket. The RRL incorporates the Streamlight® Microstream® light, which features a Super Bright C4® LED and a scratch-resistant polycarbonate lens. A momentary light activation switch is operated by the thumb, and the machined aluminum body is abrasion-resistant and extremely durable. An advantage over most gun-mounted lights, the RRL also uses just a single AAA battery. Further, the easy slide on and snap off installation of this light makes it very convenient to use. The RRL features an ambidextrous design with the tailcap on/off switch positioned directly at the shooter’s forward thumb. Made of heavy-duty polymer, the RRL has an external rib design providing added strength and an excellent grip. Included on the light is a heavy-duty pocket clip for convenient carry on clothing or the bill of a hat.