American Defense AD-509T Features The American Defense AD-509T is machined as a single piece of 6061-T6 aluminum rather than assembled from multiple parts which eliminates the play and inconsistent return-to-zero that can plague lesser mounts. The patented QD Auto Lock Lever allows the optic to be removed and reattached in seconds without tools while still locking down securely on rails that run slightly out of military specification. This low-height profile is purpose-built for the Holosun 509T footprint positioning the optic at a consistent sight height for a fast repeatable presentation. Shooters running AR pistols and other compact platforms benefit most from this quick-detach reliability. The hard coat T3 Mil-Spec anodized black finish resists wear from holster and rail contact while standing up to years of hard use in the field or on duty. Its low profile keeps the optic close to the bore axis for a more natural cheek weld and faster target transitions compared to a taller mount. Built to American Defense s exacting tolerances the AD-509T is a dependable choice for anyone who needs to swap optics between platforms without losing zero. For shooters running a Holosun 509T who want quick-release convenience without compromising mounting rigidity the AD-509T is a proven solution. American Defense AD-509T Specifications Manufacturer: American Defense Mfg. Model: AD-509T Type: Optic Mount Size: Low Compatible Hosts: Holosun 509T Material: 6061-T6 Aluminum Color: Black Finish: Anodized Description: Quick Release QD Auto Lock Lever Available At: GrabAGun