American Defense MFG Mounts - Comparison TableAmerican Defense 30mm AD-RECON-X STD Lever FDE Cantilever Scope Mount AD-RECON-X30STDFDE comes with all the features of AD-RECON mounts with the added advantage of extended eye relief over the AD-RECON model. It's made for putting high power riflescope over flattop style ArmaLite Rifle-15. This mount is built for 30mm rings. American Defense AD-RECON-X Mount is precision machined from 6061 T6 aluminum. This mount comes with hard coat T3 Mil-Spec anodized finishing. ADM has incorporated Patented QD Auto Lock Lever system to the mount for accomodating both in spec and out of spec rail systems. ADM AD-RECON X 30mm STD Lever FDE Cantilever Scope Mount