GMG-Global Military Gear MAKO 130+ Lumens L.E.D Flashlight LED Tactical - Light Kit for Mossberg 500/590/835/Maverick 88 12/20 Gauge Shotgun with A 7/8" Weaver-Picatinny Rail Includes: Weaver High Quality 130+ Lumens L.E.D. - Light Emitting Diode. Aircraft Grade Aluminum T6 Housing - O-Ring Sealed, Waterproof & Weatherproof! Front Serrated Bezel For Added Self Defense Feature. High Quality Push Button Tail Cap. 2-CR123A Batteries Included. Installs In Seconds On A 7/8" Weaver-Picatinny Rail No Gunsmithing Needed.