The Weaver 48940 Grand Slam Steel Dovetail Base is a robust 1-piece system specifically designed for securely locking a riflescope onto the Winchester 70SA 1984 rifle. Crafted from high-quality steel, this base offers excellent recoil resistance, ensuring that your optics remain firmly secured even under heavy use. The dovetail locking system incorporated into the Grand Slam base provides an ultra-secure and positive lock on rings, significantly minimizing the risk of slippage or movement. This feature enhances the stability of your scope, allowing for consistent accuracy and reliable performance in various shooting conditions. Upgrade your Winchester 70SA 1984 rifle with the Weaver 48940 Grand Slam Steel Dovetail Base and enjoy the confidence that comes with a durable and dependable mounting solution designed to withstand the rigors of the field. Experience enhanced performance and peace of mind with this high-quality base.