The Weaver 2-Piece Grand Slam Steel Dovetail Scope Base (Weaver part no. 48908) in black is a direct-fit base built for the Winchester 70 with .860-inch ring spacing, giving you a factory-matched front and rear mounting surface without any fitting. Weaver builds the Grand Slam line from steel rather than aluminum specifically so it can withstand heavy recoil and years of hard use without loosening. The two-piece design allows fine adjustment for eye relief, and the locking dovetail interface keeps the mated rings from shifting laterally, which helps a scope’s zero hold up shot after shot. It’s a durable, no-compromise base for anyone mounting glass on a Model 70.

Key Specifications

• Direct fit for the Winchester 70 receiver with .860-inch ring spacing.
• Sold as a 2-piece base, allowing independent front and rear positioning for eye relief.
• Built from steel rather than aluminum for maximum strength under heavy recoil.
• Uses a locking dovetail interface to keep mounted rings from shifting laterally.
• Finished in black to match a standard hunting rifle build.

Frequently Asked Questions

Will this base fit any Winchester 70 variant? It’s machined for the .860-inch ring spacing used on standard Model 70 receivers; confirm your specific 70 variant matches this spacing before ordering.

Do I need Weaver-specific rings for this base? Yes, the locking dovetail interface is designed to mate with Weaver-style rings for the most secure fit.

Why is this base made of steel instead of aluminum? Steel adds strength and resistance to the sharper recoil of many Model 70 hunting chamberings, at the cost of a small amount of extra weight versus aluminum.

Buy the Weaver Grand Slam Steel Scope Base for Winchester 70

A direct-fit, all-steel base is the right foundation for a hard-recoiling hunting rifle, and this Grand Slam set is built exactly for the Model 70. Order it from our Lubbock, Texas gun shop for insured shipping right to your door, and add a matched set of scope bases hardware if you’re outfitting more than one rifle.