The HE509T X2 is an enclosed reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun's Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces. Available in Red or Green.