Kastle Group RMR 45 Offset Flat Dark Earth. This solution is effective for a multitude of reasons including having a spare optic incase your primary goes down holding dual zeros if your rifle is setup to shoot sub and supersonic ammo or when you find yourself shooting from compromising positions or need to manipulate from abnormal angles with obstacles. Specifications for Kastle Group RMR 45 Offset: Manufacturer: Kastle Group Finish: Type III Hard Anodized Fabric/Material: 7075 Aluminum Red Dot Sights-Footprint: RMR Features of Kastle Group RMR 45 Offset Trijicon RMR/SRO Footprint 45 Offset Mount Position Seamless Fortress Integration Type III Hard Anodized Package Contents: Kastle Group RMR 45 Offset Kastle Group RMR-45-FDE: RMR 45 Offset Flat Dark Earth