Increase Force, And Your Options. The ultra-compact M312C Scout Light is as versatile as it is powerful. Its DS07 tail switch and included ST07 remote switch assembly offer easy instant activation of the M312C’s 500 lumens, fueled by a single 123A battery. This small, rugged WeaponLight features SureFire’s proprietary TIR lens, with a far-reaching, high-intensity beam and ample surround light. It attaches quickly and securely to any MIL-STD-1913 rail via its integral low-profile RM45 mount, which positions the light in the offset position between the rails of a MIL-STD-1913 (Picatinny) forend, decreasing overall weapon profile and limiting potential snag factor. Machined from lightweight aerospace aluminum with a Mil-Spec Hard Anodized finish, and O-ring sealed to keep out the elements, the ultra-compact M312C will withstand the rigors of combat without weighing down your weapon.