The American Defense Manufacturing® Lightweight TR Lower 1/3 QD Mount for Shield RMSC Sights is precision machined from 6061-T6 aluminum with a hard-coat Mil-Spec Type III anodized corrosion-resistant finish and offers lower 1/3 co-witnessing with Shield RMSC sights. The TR mount is 30% lighter than standard mounts and does not require proprietary tools for adjustments. This mount features the patented QD Auto Lock™ Lever system and can accommodate in-spec and out-of-spec rail systems. Order today! Made in USA.