The HE512T-RD is a versatile open reflex optic designed for long gun applications. HE512T-RD is at home on carbines, PCCs, and shotguns due its durable design. HE512T-RD features a housing made of Grade 5 Titanium and includes an absolute co-witness mount (1.41 dot height). HE512T-RD is packed with Holosun innovation including Solar Failsafe, Shake Awake, MRS (Multi-Reticle System), Red Super LED with up to 50k hour battery life, with 10 daylight and 2 night vision compatible intensity settings. Product Features MRS: Circle Dot; 2 MOA Dot; 65 MOA Circle Up to 50,000 Hours Battery Life (Setting 6) 12 Brightness Setting: 10 DL & 2 NV Compatible Convenient Tray Battery Compartment Completely Enclosed Design & Titanium Housing Parallax-free & Unlimited Eye Relief Product Specifications Window Size: 0.91x1.26 Dimension (in): 3.35x1.63x1.7 Weight (oz): 9.17 Housing Material: Titanium Surface Finish: Titanium Adjustment per Click: 0.5 MOA W&E Travel Range: 50 MOA Storage Temperature: -40 Degrees ~ 70 Degrees Working Temperature: -30 Degrees ~ 60 Degrees Submersion: IPX8 Vibration: 1000G