The FAST™ QD Lever is an optional quick detach accessory designed to enhance the versatility and convenience of the following FAST™ mounts: FAST™ MicroFAST™ Micro-SFAST™ Micro-SBFAST™ Optic Riser (as of Aug. 2023)FAST™ Absolute RiserFAST™ MROFAST™ Comp SeriesFAST™ MRDSFAST™ AEMSFAST™ MicroPrism FAST™ FTC OMNI, FAST™ FTC 30mm and FAST™ FTC PA magnifier mounts come with this lever pre-installed. NOT compatible with the FAST™ Accessory Riser, FAST™ PRO® Mount, FAST™ COG Series, FAST™ REKE or FAST™ LPVO mounts. CAUTION: The UNITY™ proprietary nut is required to prevent damage to the mounting interface. Use of a standard ADM nut (not UNITY™ proprietary) will cause damage to the host rail and is not covered under warranty. SPECIFICATIONS: Manufacturer: AMERICAN DEFENSE MFG Material: 7075-T6 ALUMINUM Coating: TYPE III HARDCOAT ANODIZED Weight: OZ: