Weaver #670 Grand Slam Top Mount Base Matte - Precision Rifle Scope Mount

The Weaver #670 Grand Slam Top Mount Base is a matte-finish rifle scope mount designed for shooters who demand a solid, repeatable platform for their optics. This two-piece base system bridges the gap between your rifle's receiver and your scope, engineered to handle the recoil of centerfire rifles while maintaining zero shot after shot. Whether you're setting up a precision rifle for long-range hunting, target shooting, or field work, a quality scope base is non-negotiable—it's the foundation everything else depends on.

The Grand Slam line represents Weaver's commitment to no-frills reliability. The matte finish resists glint and corrosion, blending into a working rifle rather than announcing itself. The two-piece design allows you to mount the rings independently of the base itself, giving you flexibility in ring placement and making field adjustments or component swaps more straightforward than integrated one-piece systems.

Built for hunters, long-range competitors, and anyone who trusts their optics to perform in the field, the #670 Grand Slam is the kind of mount that stays out of the way and does its job. No hype, no gimmicks—just a solid mount that won't let you down when it matters.

Key Features

• Two-piece design for independent ring placement and adjustment
• Matte finish for a non-reflective, field-ready appearance
• Engineered for reliable zero retention on centerfire rifles
• Precision machining for repeatable, tight fit

Frequently Asked Questions

What rifles is the Weaver #670 Grand Slam base compatible with?

The #670 is designed as a top-mount base for rifles with appropriate receiver dovetails or drilled-and-tapped holes. Check your rifle's receiver configuration or contact us to confirm fitment before ordering.

Is this a one-piece or two-piece mount?

The #670 Grand Slam is a two-piece base system, meaning the front and rear bases are separate components. This design allows you to position your rings to suit your scope, gun, and eye relief preferences.

What kind of rings does the Grand Slam base work with?

The #670 base is compatible with Weaver-style rings. We recommend confirming ring specifications and height with the ring manufacturer or our staff to ensure proper clearance and eye relief with your specific scope.