American Defense AD-509T Optic Mount Features The American Defense Mfg AD-509T was developed specifically for the Holosun 509T red dot giving shooters a purpose-built mount for AR pistols and other weapon platforms that call for a small lightweight red dot system. The mount is machined as a one piece unit from 6061 T6 aluminum providing a rigid durable base that resists flex under recoil. A hard coat T3 Mil-Spec anodized finish in black protects the mount from wear and corrosion through repeated use in the field. Co-witness height positioning keeps the Holosun 509T aligned with the host s iron sights for a consistent sight picture. The patented QD Auto Lock Lever system is engineered to accommodate both in-spec and out-of-spec Picatinny rail systems giving shooters a secure wobble-free fit across a range of rifles and pistols. This quick release design allows the optic and mount to be removed and reattached while returning to zero useful for shooters who move an optic between platforms. The mount s compact footprint keeps the overall profile low and unobtrusive on the host firearm. The American Defense Mfg AD-509T for the Holosun 509T footprint is for sale at GrabAGun for shooters who want a secure repeatable quick release optic mount. American Defense AD-509T Optic Mount Specifications Manufacturer: American Defense Mfg. Model: AD-509T Type: Mount Size: Co-Witness Color: Black Finish: Anodized Compatible Hosts: Holosun 509T Available At: GrabAGun