Description The American Defense Mfg Holosun 509T Co-Witness Mount (Model: AD-509T) is expertly designed for the Holosun 509T red dot sight, providing a robust and lightweight solution for AR pistols and other weapon platforms. Crafted from precision machined 6061 T6 aluminum, this one-piece mount is finished with a hard coat T3 Mil-Spec anodize for enhanced durability. The innovative QD Auto Lock Lever system ensures compatibility with both in-spec and out-of-spec rail systems, making it an essential addition for shooters seeking reliability and performance. Elevate your shooting experience with the Holosun 509T Co-Witness Mount.