The AD-SCOUT mount is made for putting high power glass onto a flattop style AR-15. The cantilever throws the scope out front, allowing you to get the right eye relief. The mount was also designed to accommodate the mounting of full size optics on a short rail, usually found on scout type rifles. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock(TM) Lever system to accommodate both in spec and out of spec rail systems. Features The AD-SCOUT mount features the Patented QD Auto Lock(TM) Lever system which has the following advantages: Does not require proprietary tools for adjustment. Mfg: American Defense Manufacturing