The Unity Tactical MRDS Top Ring enables mounting of micro red dot sights directly to the top of FAST LPVO scope mounts providing 30mm compatibility in a durable Flat Dark Earth finish.Unity Tactical MRDS Top Ring for FAST LPVO Mount30mm optic tube compatibility7075-T6 aluminum construction for maximum durabilityType III Hardcoat Anodized in Flat Dark Earth (FDE)Positions micro red dot at 12 o'clock when used with FAST Optic Adapter PlateCompatible with Unity FAST LPVO Mount systemEssential accessory for tactical shooters seeking to add backup optics or co-witness capabilities to their FAST LPVO setup. Requires separate FAST LPVO mount and FAST Optic Adapter Plate for complete installation.