The Mark 4 steel 1-piece base is expertly designed to fit the Winchester 70 Long Action, providing an additional 20 MOA of elevation to enhance your long-range shooting capabilities. These mounts are precision-machined with tight tolerances, ensuring superior integrity based on the proven cross-slot design. The connection between your scope and firearm is essential for optimal performance, which is why Leupold mounts are built to be as rugged and dependable as the optics they secure. With an extensive variety of mounting systems available, you're sure to find the perfect match for your firearm and shooting style. Proudly made in the USA, Leupold mounts are guaranteed to withstand a lifetime of rigorous use, ensuring they will never let you down when it matters most. Elevate your shooting experience with the Mark 4 steel base, designed for strength, reliability and exceptional performance in any shooting environment.