SUREFIRE M6 Guardian Tactical Combatlight Max Output: 250/500* lumens Runtime: 60/20* minutes 2007 No Hassle Lifetime Guarantee: If it breaks, we fix it! 2.5-inch diameter Turbohead reflector for tight beam and extended-range illumination Rugged aerospace-grade aluminum body, Mil-Spec Type III hard anodized in olive drab Shock-isolation system provides extra recoil/impact protection for lamp filament Switch lockout prevents accidental activation during transport or storage