The HE509T-RD 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. This X2 version adds improved glass clarity, Lock Mode, and a full Multi-Reticle System providing 32MOA circle with 2MOA dot, dot only, or circle only reticle options.The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces.  Included in box - RMR Adapter - User Manual - Lens Cloth - T10 L Key - CR1632 Battery