American Precision Arms FR-1 RDM Leupold DPP Red Dot Sight Black. . Made From 6061-T6 aluminum Type III Hardcoat Anodized Teflon impregnated. Mount integration: The FR1 Red Dot Mount design incorporates 3 pins pulled at a 45-degree angle using APAs enhanced 8-40 screw. This provides a component of force both down and angular into the 3 points for unprecedented repeatability and strength. Specifications for American Precision Arms FR-1 RDM Red Dot Sight: Manufacturer: American Precision Arms Color: Black Finish: Type III Hard Anodized Fabric/Material: 6061-T6 Aluminum Package Contents: American Precision Arms FR-1 RDM Red Dot Sight American Precision Arms FR1RDMLP: FR-1 RDM Leupold DPP Red Dot Sight Black