The AD-AEMS mount is designed as a QD replacement mount for the Holosun AEMS Red Dot. The mount is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize and features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems.Features :The AD-510C QD mount features the Patented QD Auto Lock Lever system.Does not require proprietary tools for adjustment.Can be adjusted with your finger or a flat blade screwdriver.Lever can be configured to lock to the front or the rear.Superior clamping surface to insure maximum rail engagement.