The Weaver #671 Grand Slam top mount base is a matte-finish rifle scope mounting solution engineered for shooters who demand rock-solid optic attachment without unnecessary complexity. If you're building or upgrading a hunting rifle, precision bolt gun, or range shooter and need a dependable scope base that works with standard Weaver-pattern rings, this is the straightforward hardware that gets out of your way and lets you focus on the shot.
Weaver has been the industry standard for scope mounting systems for decades, and their top mount bases are built on that reputation. The #671 Grand Slam is designed to deliver the repeatability and durability serious shooters expect—no wobble, no creep, just a solid platform between your rifle and your glass.
The matte finish blends with modern rifle aesthetics and won't throw unwanted reflections in field conditions. Whether you're zeroing a new hunting setup or dialing in a precision rifle for extended range work, a quality base is the foundation everything else depends on. The #671 is Weaver's answer for shooters who refuse to cut corners on mounting.
| Brand | Weaver |
| Product Line | Grand Slam |
| Mount Type | Top Mount Base |
| Finish | Matte |
| Ring Pattern | Weaver |
The #671 uses the standard Weaver-pattern mounting surface, so it's compatible with any Weaver-pattern scope rings.
Yes. The #671 is designed as a general-purpose top mount base for hunting rifles, target rifles, and other applications where a reliable Weaver-pattern base is needed.
The #671 Grand Slam comes in a matte finish, which provides a non-reflective surface appropriate for field use and modern rifle builds.
Weaver
