The SureFire X400 Ultra WeaponLight integrates stunningly powerful white-light illumination and bright green laser aiming capabilities in one compact rail-mountable package, an extremely effective combination for close- to medium-range engagements in law enforcement, military, and self-defense applications. A high-performance LED generates 1000 lumens of brilliant white light that is focused by a Total Internal Reflection (TIR) lens to produce a tight beam with extended reach and significant surround light for peripheral vision. The X400 Ultra produces tactical-level light-enough to overwhelm an aggressor's dark-adapted vision-for 1.5 hours per set of batteries. The X400 Ultra's 5-milliwatt laser sight, located below the primary light, emits a high-visibility green (505 nM) beam. The laser's aiming adjustment mechanism uses Nylok screws that won't back out from the effects of recoil, which means it rarely needs to be re-zeroed. Activating the X400 Ultra is done via...