Never Engage With A Low-Grade Light. With its recoil-proof, ultra-high-output LED delivering 1000 lumens of blinding white light, the M600U ensures you won’t. Its proprietary TIR lens shapes the light into a far-reaching beam with ample surround light for exceptional peripheral vision, making the M600U ideal for medium to longer-range applications. Battle proven and rugged, the M600U is also lightweight and maneuverable. It quickly and securely attaches to any MIL-STD-1913 rail via its integral thumbscrew clamp, and it is easily activated by either clicking its push-button tailcap switch or by pressing the pressure-activated tape switch on select models. Constructed of lightweight aerospace aluminum, Mil-Spec Hard Anodized finish, and O-ring sealed to keep out the elements, the tough M600U will endure combat-like conditions without any sacrifice in weapon maneuverability.