Featuring a fully adjustable design with a patented Elite Defense® Quick-Detach (QD) mount design with a smooth, multi-faceted adjustment nut, the Midwest Industries® Trijicon® RMR® QD Co-Witness Mount is a precision-machined optics mount, designed to deliver smooth, tool-free adjustments, superior rigidity, and a quick return to zero in any target-rich environment. Durable, yet lightweight 6061 aluminum construction offers a lifetime of dependable service, while the corrosion-resistant hard-coat anodized finish protects against scratches and rust for enhanced strength and longevity. Better yet, this mount is 100% American-made for superior quality and long-lasting service life. Lifetime warranty. Made in USA.