The SureFire X300 Ultra delivers a stunning 600-lumen beam focused by a precision TIR lens. Its specially selected high-performance LED is biased slightly towards the yellow-green part of the spectrum to which the human eye is most sensitive. This combination of extreme output and optimized off-white light color increases perceived light available for the user, creates a brighter surround beam for enhanced situational awareness, and increases the blinding effect on an opponent's dark-adapted vision. The X300 attaches to the Picatinny and Universal rails found on many handguns, and will fit many popular rail-less handguns by using SureFire' s MR adapter mounts. It features integral one-finger ambidextrous switching and can be equipped with SureFire' s optional DG handgun grip switch. Also attaches to the Picatinny rails on long guns, and can be activated via optional remote switches..