The Mark 4 steel 1-piece base is specifically designed to fit the Weatherby Mark-V, ensuring a perfect alignment and secure mounting for your optics. Machined with precision tolerances, these mounts provide superior integrity rooted in the proven cross-slot design. The connection between your scope and firearm is vital for optimal performance, which is why Leupold mounts are crafted to be as rugged and dependable as the optics they support. With a vast selection 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, engineered for strength, reliability and exceptional performance in any shooting environment.