Trust The Standard. Popular with law enforcement and military operators around the world the Rail-LockA(R) version our best-selling WeaponLight now delivers a stunning 1000 lumens of LED-generated output. Focused by a precision TIR lens it creates a far-reaching high-intensity beam with a larger center spot plus surround light an extremely effective combination for close- to medium-range engagements. You can count on the X300U-A to help you positively identify threats at significant distances while temporarily impairing your adversary's vision. It also provides extensive peripheral illumination for maintaining situational awareness. Ambidextrous switching provides one-finger control of momentary-on or constant-on activation. Its rugged aerospace aluminum body is Mil-Spec hard anodized for scratch and corrosion resistance and sealed to make it weatherproof. It's also IPX7 waterproof to 1 meter for 30 minutes.The X300U-A delivers a standard of excellence you can trust.Features: The best-selling SureFire handgun WeaponLight now generating 1000 lumens Rail-LockA(R) system permits rapid attachment to and removal from rails on pistols or rifles Intuitive switching allows instant activation without altering grip; Accessory switches for pistols and tape switches for long guns are available. Recoil-proof high-performance LED produces 1000 lumens Custom TIR lens creates smooth far-reaching light with a larger center spot beam that is ideal for close- to medium-range engagements Integral ambidextrous momentary- and constant-on switching provides easy instant activation Attaches securely to both Universal and Picatinny accessory rails IPX7 waterproof to 1 meter for 30 minutes High-strength aerospace aluminum body is Mil-Spec hard anodized for extreme durability Accepts optional pressure-activated DG and XT remote switches for precision control without altering grip on weapon