Midwest Industries MK2 QD RMR Mount Lower 1/3 Cowitness Red Dot Mount for Trijicon RMR style sights. Made in the USA from hard-coat anodized 6061 aluminum. Features a patented quick-detach lever for tool-free, adjustable attachment. Compatible with RMR, Acro, T2, and Micro Dot patterns. Ambidextrous operation and precise machining for stable, repeatable performance on Picatinny rails.