The Holosun 509T QD Mount by American Defense Manufacturing is designed for seamless integration with the Holosun 509T red dot sight, making it ideal for AR pistols and other platforms requiring a lightweight red dot system. This one-piece mount is precision machined from 6061 T6 aluminum and features a hard coat T3 Mil-Spec anodize finish for enhanced durability. The patented QD Auto Lock Lever system ensures a secure fit, accommodating both in-spec and out-of-spec rail systems without the need for proprietary tools. Whether using your fingers or a flat blade screwdriver, adjustments are quick and easy, with the lever configurable to lock either to the front or rear, providing superior clamping surface for maximum rail engagement.