The HE512T-GR is an enclosed reflex optical sight designed for rifle and carbine applications. Features include a Titanium housing, Holosun's Green Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake.Features :Green MRS: Circle Dot2 MOA Dot65 MOA CircleUp to 50,000 Hours Battery Life (Setting 6)12 Brightness Setting: 10 DL & 2 NV CompatibleConvenient Tray Battery CompartmentCompletely Enclosed Design & Titanium HousingParallax-free & Unlimited Eye Relief