Holosun HE509T-GR X2 1x 28mm Green Dot - 2 MOA Dot & 32 MOA Circle - The HE509T-GR X2 is an enclosed reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun's Super Green LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. The 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. MRS: Circle Dot; Dot Only; Circle Only Up to 50,000 Hours Battery Life (Setting 6) 12 Brightness Setting: 10 DL & 2 NV Compatible Enclosed Design & Titanium Housing Convenient Tray Battery Compartment Parallax-free & Unlimited Eye Relief