Used SureFire M340C 3V Mini Scout Light Pro LED WeaponLight Black

Increase Force. Decrease Mass.
The Mini Scout Light Pro is mighty in stature yet minimal in structure. It feeds off a single 123A lithium battery, but its virtually indestructible LED devours the darkness with 500 lumens of light focused by a TIR lens into a high-intensity hybrid beam. It's ideal for close- to longer-range operations. SureFire's new Low-Profile Mount (LPM) delivers unprecedented versatility, allowing the user to optimize the light's position relative to the rail. Rugged and reliable, the LPM easily and securely attaches to any MIL-STD-1913 or M-LOK rail. Activation is easy: Simply click the Mini Scout Light Pro's push-button tailcap switch or press its pressure-activated tape switch, included on appropriate models. Machined from lightweight aerospace aluminum with a Mil-Spec hard anodized finish and O-ring sealed to keep out the elements, the ultra-compact Mini Scout Light Pro withstands the rigors of combat without weighing down your weapon.