Ultimate Arms Gear Mossberg 500-590-835 Tactical Dual Red & Green Dot CQB Scope Weaver-Picatinny Aluminum Rail Base Mount, 7/8" Mounting Rings, Lithium Battery and Lens Cleaning Kit Magnification 1X Fixed Crystal Clear 30mm Lens Illuminates Red & Green For Day & Night Tactical Situations Full Windage and Elevation Adjustments Nitrogen Filled, Shockproof, Fogproof, and Water Resistant