Similar to the AD-RECON, the AD-RECON-S 20MOA mount is made for putting high power glass onto a flattop style bolt action rifle with 20 MOA built in to the base. 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 1" rings. Specifications: ADM AD-Recon-S 20MOA 1" Mount AD-RECON-S20MOA1STD