American Defense AD-T1−10 Mount paired with the Holosun HS503GU-GR Elite Optic. The Holosun HS503GU-GR Elite features the green circle dot reticle. This is a one piece Mount that will Absolute Co-Witness with standard AR-15 height Iron Sights. Packages are shipped un-mounted in their separate factory boxes. Assembly required. Available only to United States customers, Cannot be exported. Not available to dealers.