The powerful and versatile SureFire X300 Ultra WeaponLight for handguns and long guns 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 generates tactical-level light—more than enough to overwhelm an aggressor's dark-adapted vision—for 1.5 hours per set of batteries. Activating the X300 Ultra is done via ambidextrous switching located at the rear of body, providing one-finger control — press the switch on either side for momentary-on activation, flip up or down for constant-on activation. Optional DG grip switches (for pistols) and a pressure activated XT07 tape switch (for long guns) permit the X300 Ultra to be activated without altering your grip on your weapon. The X300 Ultra 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 high-strength aerospace aluminum body is Mil-Spec hard anodized for superior toughness and is O-ring and gasket sealed to make it weatherproof. FITS: Handguns and long guns with Picatinny or Universal rails. Adapter mounts available for several non-railed handguns. Features Virtually indestructible LED regulated to maximize output and runtime Tactical-level output with TIR lens for close- to longer-range applications Quick-detach rail clamp Accepts optional pistol grip and long gun forend switches Weatherproof—O-ring and gasket sealed Construction—High-strength aerospace aluminum with Mil-Spec anodizing; impact-resistant polymer; coated tempered window Includes high-energy 123A batteries with 10-year shelf life Specifications Max Output -- White Light 600 .0 lumens Tactical Runtime** 1 .5 hours Length 3 .60 inches Bezel Diameter 1 .125 inches Weight w/Batteries 4 .0 ounces Batteries 2 123A (included) *Runtime until output drops below 10% of maximum output