High-Quality LensThis 1.2″ (30mm) dia. coated lens allows you to have a clear field of view as wide as 50′ at 100 yards and comes with removable spring-loaded flip lens covers for extra protection.Outstanding VersatilityThis red and green dot sight is perfectly compatible with and easy to install on all 0.8″ (20mm) Weaver and Picatinny rails.Precise Windage & Elevation AdjustmentsQuickly and easily zero in on your target with the elevation and windage dials. Pull the trigger with confidence that your aim is true.Dual-Illuminated Dot SightWith our adjustable dot sight, you can fully enjoy shooting in the day with the conspicuous green light, while being ready for night with the distinct red dot.