The Trijicon RMR HD Sight is a pistol optic designed for Law Enforcement and Military use. It features a 3.25 MOA or 1 MOA red dot reticle with 55 MOA ring, and allows selectable options to use the dot or dot with ring. The optic is built on a forged aluminum housing and includes a long-lasting, top-loading CR2032 battery with up to 3 years of battery life.