The powerful and versatile X300 Ultra LED 600 Lumen Weapon Light features a high-performance LED that generates 600 lumens of stunning white light focused by a Total Internal Reflection (TIR) lens to produce a tight beam with extended reach and significant surround light for peripheral vision. The virtually indestructible and highly efficient LED on these from SureFire generate 1.5 hours of tactical-level light per set of batteries that's more than enough to overwhelm an aggressor's dark-adapted vision. The high-strength aerospace aluminum body on the SureFire 600 Lumens X300 Ultra Weapon Light is Mil-Spec hard anodized for superior toughness and is O-ring and gasket sealed to make it weatherproof. The Surefire X300 Ultra LED 600L Weapon Light is also versatile and can be attached to a pistol or a long gun since its Rail-Lock system permits rapid attachment to and removal from either Universal or Picatinny rails. Its integral ambidextrous push/toggle switch provides one-finger operation for either momentary or constant-on operation, ensuring that you have versatility in your hands with the SureFire X300 Ultra Gun Light.