The American Defense AD-509T QD mount was developed specifically for the Holosun 509T red dot for use on AR pistols and other weapon platforms requiring a small lightweight red dot system. This co-witness height mount is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize.American Defense AD-509T Quick Detach MountCompatible with Holosun 509T footprint red dot sightsPatented QD Auto Lock Lever systemNo proprietary tools required for adjustmentAdjustable with finger or flat blade screwdriverLever configurable to lock front or rearSuperior clamping surface for maximum rail engagementAccommodates both in-spec and out-of-spec rail systemsPerfect for AR pistols and tactical applications where quick detachment and reliable mounting are essential for operational flexibility.