GMG-Global Military Gear FDE Flat Dark Earth Tan 90+ lumens Flashlight Tactical Light Kit for AR15, AR-15, M16,M-16 Rifle with A 7/8" Weaver-Picatinny Rail Includes: Weaver-Picatinny Ring High quality flashlight, 90+ lumens Aircraft grade aluminum t6 housing - o-ring sealed, waterproof and weatherproof Front serrated bezel for added self defense feature High quality pressure switch and push button tail cap lets you turn light on and off . 2-cr123a batteries included Installs in seconds on a 7/8" weaver-picatinny rail no gunsmithing needed