The Red Four Reticle Reflex Optic by NcStar features reticle choices of dot, bullseye, cross and starburst. The LED is 100% safe for the eyes and there is unlimited eye relief for flexible mounting. The rheostat knob allows the user to choose from 7 brightness settings. This optic features a black anodized aluminum body, a rubber lens cover, heads up display and a built-in Weaver-type mount for installation on Weaver or Picatinny-type rails.