The Red & Green Reflex Sight by NcStar features 4 reticle choices" dot, bullseye, cross and starburst. The LED is safe for the eyes, unlimited eye relief for flexible mounting and the rheostat knob allows the user to choose from 5 brightness settings. This optic features a black anodized aluminum body, a rubber lens cover, a heads up display design that promotes unlimited eye relief for flexible mounting and a built-in QR Weaver mount for installation on Weaver/Picatinny type rails.