The SureFire X400 Ultra WeaponLight integrates powerful white-light illumination and bright red laser aiming capabilities in one compact, rail-mountable package. The 5mW laser sight emits a high-visibility red (635nM) beam, and the high-performance LED generates 500 lumens of brilliant light focused by a Total Internal Reflection (TIR) lens to produce a tight beam with extended reach and significant surround light for peripheral vision. Its can be attached to a pistol or a long gun, because its Rail-Lock system permits rapid attachment/detachment to/from either Universal or Picatinny rails. This WeaponLight is activated via ambidextrous switching at the rear of the body, providing one-finger control, and it is O-ring and gasket-sealed for weatherproofing. The high-strength aerospace aluminum body is Mil-Spec hard-anodized for superior toughness and corrosion resistance.