SureFire M640U Scout Light Pro Includes MLOK Mount and Z68 Tailcap The SureFire M640U is a scout light designed with SureFire's brand new low-profile mount. This mount is versatile and allows the user to adjust and optimize the light's position. Powered by two CR123As, this weapon light is capable of emitting a 1000 lumen beam for over an hour. Plus, with a TIR optic lens, this beam has a significant reach and is great for medium to long-range encounters. The M640U operates through a Z68 push-button switch that provides instant activation with a single click. Built from rugged, lightweight anodized aluminum, this weapon light can take a significant beating, yet continue to protect the delicate circuity and optics inside of the light. Features: New low-profile Picatinny mount provides unprecedented versatility Virtually indestructible, recoil-proof LED generates a 1000 lumen output TIR lens provides a long-range beam Reliable push-button activation with Z68 tailcap Lightweight aluminum housing Scratch and corrosion-resistant hard-anodized finish Available in black or tan Included Accessories: MLOK Picatinny Mount Z68 Tailcap 2 x CR123A Batteries Specifications: Power Source: 2 x CR123A Batteries Output / Runtime: 1000 lumens / 1.25 hours Dimensions: Length: 5.5" Bezel Diameter: 1.125" Weight: 4.8oz