The SureFire Dual Fuel Scout Light Pro offers the same size, flexible power source, and 1500 Lumen output as the standard model, but features a brand-new body design with a versatile mounting system. The new light body mount can be switch from either picatinny or M-LOK and allows you to orient your light at any angle to optimize ergonomics when use in conjunction with laser aiming modules or other accessories. The M640 Scout Light Pro Weapon Light uses an 18650 rechargeable battery to power the 1500 Lumen white light head, and can use a pair of CR123A batteries with reduced 1200 lumens output. The rear tailcap switch offers momentary or constant on function and can be replaced with other SureFire Scout tailcaps for use with remote switches. The entire weapon mounted light is constructed from aluminum, hardcoat anodized black, and O-ring sealed to protect it from the elements. The Scout Light Pro Weapon Light brings more versatility to your weapon system without the added cost of a mount.