This Mark 4 steel one-piece base is engineered to fit a Browning A-Bolt short action, providing an additional 20 MOA of elevation. These mounts are precisely machined to exacting tolerances, ensuring superior integrity through a proven cross-slot design. The connection between your scope and firearm is of utmost importance, which is why our mounts are as robust and reliable as the Leupold optics they support. With an extensive range of mounting systems available, you are certain to find the ideal match for your firearm and shooting style. Manufactured in the USA and guaranteed to withstand a lifetime of rigorous use, Leupold mounts are designed to never fail you.