The Mark 4 steel 1-piece base is specifically designed to fit a Winchester 70 Short-Action while adding 20 MOA of elevation for extended-range shooting. Machined with precision tolerances, these mounts provide superior integrity thanks to their proven cross-slot design. As the critical link between your scope and firearm, these mounts are engineered to be just as rugged and reliable as the Leupold optics they support. With a wide range of mounting systems available, you'll easily find the perfect match for your firearm and shooting style. Made in the USA and built to withstand a lifetime of tough use, Leupold mounts deliver unmatched durability and performance you can trust.