Weaver Mounts 40A Top Mount Base Gloss Black Aluminum Remington 700 / Ruger M77 / Weatherby Mark V

The Weaver Mounts 40A Top Mount Base is a rugged 1-piece scope base machined from aluminum and finished in a durable gloss black coating. Built to provide a stable foundation for scope rings and optics, this top-mount base attaches directly to the rifle receiver and is custom-fit for some of the most popular bolt-action rifles on the market.

Engineered to Weaver tight-tolerance specifications, the 40A delivers a precise drop-on fit for Remington 700, Ruger M77, and Weatherby Mark V rifles. The integrated Weaver cross-lock design accepts the full range of Weaver rings and similar Weaver-pattern mounts, giving shooters maximum strength so rings hold tight and stay zeroed shot after shot.

Installation is straightforward: the single-piece base mounts directly to the receiver using the included mounting screws, providing a single rigid platform for your optic. Scope rings are not included and must be purchased separately. Whether you are outfitting a Remington 700, Ruger M77, or Weatherby Mark V rifle, the Weaver 40A Top Mount Base delivers reliable performance in a durable aluminum package.