Streamlight 88058 ProTac Rail Mount 1 Black Anodized Aluminum Rifle 40/350 Lumens, White LED Bulb, 219 Meters Beam, Picatinny Rail MountThe ProTac Rail Mount 1 features a fixed mount for Picatinny rails. It uses either a remote switch or a standard push button switch with momentary constant or strobe mode. Integrated rail clamp attaches to MIL STD 1913 rails; easy to attach, secure mounting. The light can run on either a lithium or an alkaline battery. Includes batteries, remote pressure switch, push button tail switch, remote retaining clips, double sided tape and zip ties.