The AD-RECON mount is made for putting high power glass onto a flattop style AR-15. The AD-Recon works with scopes with Objective Housings as large as 56mm. The cantilever throws the scope out front, allowing you to get the right eye relief. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. For 30mm rings.