The Super Precision MRO Series was developed specifically to work with the Trijicon MRO and like mounted red dot optics. These mounts are precision machined from a single piece of 7075-T6 high strength aluminum and will be available in both co-witness and lower third co-witness options. Product Specifications Material: 7075-t6 Color: Black Finish: Type-3 Hardcoat Anodize Lower 1/3rd Weight: 2.1oz