The American Defense AD-509T is a precision-engineered low-profile mount specifically designed for the Holosun 509T red dot sight. This one-piece unit is machined from 6061 T6 aluminum and features a hard coat T3 Mil-Spec anodized finish for maximum durability.American Defense AD-509T Low MountCompatible with Holosun 509T footprintPatented QD Auto Lock Lever systemQuick release functionality without proprietary tools6061 T6 aluminum construction with Mil-Spec anodizingWorks with both in-spec and out-of-spec rail systemsAdjustable with finger or flat blade screwdriverConfigurable lever lock (front or rear)Superior clamping surface for maximum rail engagementIdeal for AR pistols and weapon platforms requiring a lightweight reliable red dot mounting solution with quick detach capability for tactical applications.