The UTG ACCU Sync Spring-Loaded AR15 Flip-Up Rear Sight is a backup iron sight designed for quick deployment. This AR rear sight features dual apertures that provide clear aim during both CQB and long-range shots. This flip-up sight has integral recoil stops that ensure a secure return to zero for consistent aim. A spring-loaded push-button system on this UTG rear sight quickly deploys the sight when you need it and ensures the sight tower stays secure. Built with aircraft-grade aluminum, the UTG ACCU Sync Spring-Loaded AR15 Flip-Up Rear Sight offers a reliable iron sight system with a low-profile design and fast deployment.