The SureFire M312C Mini Scout light, powered by one 123A lithium battery, is an ultra-compact and powerful LED weapon light that mounts securely to any MIL-STD-1913 Picatinny rail via the RM45 off-set mount. The m312's recoil-proof LED emitter is focused by a tie lens to create a high-intensity 300-lumen beam with plenty of reach for close- to medium-range applications with enough surround light to optimize situational awareness. This ultra-compact M312C-BK minimizes added weight, frees up rail space for other accessories, and increases weapon Maneuverability compared to larger weapon lights. The SureFire RM45 off-set mount, designed specifically for Scout light models equipped with a Thumbscrew clamp, positions the light in the off-set position between the rails of a MIL-STD-1913 (Picatinny) for end, decreasing overall weapon profile and limiting potential snag factor. The robust RM45 is constructed of lightweight but strong aerospace aluminum that's hard anodized with a mil-spec type III finish - so it's extremely durable and resists corrosion while adding very little weight to your weapon. The DS07 is a waterproof switch Assembly for SureFire Scout light weapon lights. It includes a system-disable feature, a click on/off pushbutton switch, and an St07 switch Assembly with a 7 inch plug-in momentary-on remote tape switch. The integrated pushbutton and remote switch assemblies operate independently, providing switch redundancy..