Compact and extremely powerful, the M600 Ultra Scout Light uses a high-performance, virtually failure-proof LED to produce 500 lumens of blinding output, and it continues producing tactical light for 1.5 hours on a set of batteries. This model is identical to the M600 Ultra Scout Light but does not include a remote tape switch. Its output is focused by a Total Internal Reflection (TIR) lens into an intense, far-reaching beam that also provides significant peripheral illumination, making it ideal for close- to longer-range applications. The compact M600 Ultra minimizes added weight, frees up rail space for other accessories, and increases weapon maneuverability compared to larger WeaponLights. It attaches by means of an integral thumbscrew clamp to long guns equipped with a MIL-STD-1913 Picatinny rail. This model (M600U-Z68-BK) comes with an installed click-type pushbutton tailcap switch: press for momentary on, press further to click constant-on. The switch is shrouded to minimize the chance for accidental activation. A remote tape switch can be ordered as an option, or order the previously mentioned M600 Ultra Scout Light, which includes this switch. Constructed of high-strength aerospace aluminum with Mil-Spec Type III hard anodizing for superior toughness and corrosion resistance, the M600 Ultra is O-ring sealed to keep out the elements. And, like all SureFire WeaponLights, it?s built to withstand the rigors of combat..