Holosun HS510C 1x Green Dot - 2 MOA Dot/ 65 MOA Circle - The HS510C-GR is a versatile open reflex optic designed for long gun applications. At home on carbines, PCCs, and shotguns due its durable design. Features an aluminum housing with titanium hood for added shock resilience and includes a QD absolute co-witness mount (1.41in dot height). Solar Failsafe Shake Awake MRS (Multi-Reticle System) Green Super LED with up to 50k hour battery life, with 10 daylight and 2 night vision compatible intensity settings Includes: Absolute Cowitness QD Mount T10 L Key User Manual CR2032 Battery Lens Cloth