Nobody makes bases to fit as many guns as Weaver. Yet each base is machined to tight tolerances for a custom fit. They're designed to fight the effects of recoil with a square cut notch that precisely mates to the sturdy cross bolt in every Weaver Detachable Ring. Custom hardened fastening screws come with every Weaver base.

Specification and Features:
Positions scope 3/4" farther forward or backward
Includes 1 standard ring and 1 extension ring
Improves eye relief
Extra high
Black