NCStar Rail Pistol Laser w/Keymod Mount - Red Laser.  Mounts to all standard weaver rail systems, pistols, and rifles.  The laser has a Keymod rail below it so you can attach additional Keymod accessories directly to the laser. Does not mount to Keymod rail systems, you must have a standard rail to mount to, then you can add Keymod accessories to this laser.  Very compact and an awesome powerful laser system.  Has constant on/off/toggle and strobe mode.

The laser is powered by 2x CR1/3N batteries (included).  Laser is about 2 inches long, black anodized aluminum construction. For use on real guns, but works great on airsoft.