Ultimate Arms Gear 1X30 Tactical CQB Dual Red & Green Dot Dovetail 3/8" Crossbow-Pistol-Gun-Hunting Sight Scope + Built in 3/8" Dovetail Mounting Base , Lithium Battery & Lens Cleaning Kit Magnification - 1X Crystal Clear 30mm Lens Illuminated Red Or Green 2MOA Dot For Day & Night Tactical Situations Full Windage and Elevation Adjustments Nitrogen Filled, Shockproof, Fogproof, and Water Resistant