The SureFire M300 Mini Scout Light, powered by one 123A lithium battery, is an ultra-compact and powerful LED WeaponLight that mounts securely to any MIL-STD-1913 Picatinny rail via an integral thumbscrew clamp. Its M300's recoil-proof LED emitter is focused by a TIR lens to create a high-intensity 500-lumen beam with plenty of reach for close- to medium-range applications with enough surround light to optimize situational awareness. This ultra-compact model minimizes added weight, frees up rail space for other accessories, and increases weapon maneuverability compared to larger weapon lights. It comes with an installed click-type tailcap pushbutton switch -- press for momentary-on, press further to click constant-on. The switch is shrouded to minimize the chance for accidental activation. The Mini Scout Light is machined from high-strength aerospace aluminum with Mil-Spec Type III hard anodizing that s built for combat conditions without weighing your weapon down.