Weaver Top Mount Base 63B are machined to the tightest tolerances for a custom fit. Designed with a square-cut notch that precisely matches every Weaver detachable ring, they fight the effects of...

Each Weaver base is machined to tight tolerances for a custom fit. These Aluminum bases offer maximum strength for rings to hold tight. Bases are sold individually.

The matte black Top Mount Base #416M from Weaver has been machined to tight tolerances for a custom fit. This aluminum base offers maximum strength so that the rings will hold...