NC STAR's Bullseye 4-Reticle Red Dot optic solid, aluminum constructed sight that keeps your shots on target. With a large 24x34mm crystal clear ruby coated objective lense you have the option to choose between the classic dot, bullseye, cross-dot, and starburst reticles. The optic is operated by a CR2032 battery powering a ultra-bright battery-saving LED. With an easy-on picatinny/weaver base, this optic mounts to any standard RIS system. The unlimited eye-relief of reflex optics such as this make them perfect additions to any rifle for any shooter!