The Unity Tactical LLC Fast QD Lever is a precision-engineered accessory designed for seamless integration with various fast mounts including the fast micro fast micro-s fast optic riser (as of August 2023) fast absolute riser fast comp series fast mro fast mrds fast microprism fast ftc omni fast ftc 30mm and fast ftc pa magnifier mounts. This quick detach lever is constructed from durable 7075 T6 aluminum ensuring lightweight strength and longevity. Measuring 2.10 inches in length it is crafted for a secure mount to Picatinny rails and comes with a single piece design for simplicity and reliability. Please note that it is not compatible with the fast cog series and fast lpvo mounts. The Unity proprietary nut is required to prevent potential damage to the mounting interface as using a standard ADM nut will result in damage to the host rail which is not covered under warranty.