The Weaver Grand Slam 2-Piece Steel Base for Winchester 70 WSSM (Weaver part no. 48907) is a dedicated scope base machined to fit the Winchester Model 70 WSSM receiver. Built from solid steel rather than lighter aluminum, it is designed to shrug off the heavy recoil that short magnum WSSM cartridges generate without loosening or shifting zero. The two-piece design allows independent front and rear adjustment, and Weaver’s locking dovetail system gives mounting rings a secure, repeatable fit every time you attach a scope. Finished in black gloss, it is a straightforward, no-nonsense base for hunters who want their optic to stay put through hard-kicking cartridges.

Key Specifications

• Machined from solid steel for maximum strength under heavy recoil.
• Uses a two-piece base design for independent front and rear ring adjustment.
• Features Weaver’s locking dovetail system for a secure, repeatable ring fit.
• Built specifically for the Winchester Model 70 WSSM receiver.
• Finished in black gloss to match factory blued rifles.

Frequently Asked Questions

Will this fit a standard Winchester 70, not the WSSM? No, this base is machined specifically for the Winchester 70 WSSM receiver footprint; a standard Model 70 uses a different Weaver base.

Does this base include rings? No, this listing is the base only; Weaver dovetail rings are sold separately to complete the mount.

Buy the Weaver Grand Slam 2-Piece Steel Base for Winchester 70 WSSM

A steel base built for your exact receiver is the foundation of a scope mount that holds zero, and this Weaver Grand Slam base is purpose-built for the Winchester 70 WSSM. Order it from Weaver through our scope bases lineup and we will ship it fast from our Lubbock, Texas gun shop.