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.
Marlin 39A, 39D and Century octagon barrel
Remington 12C octagon barrel
Savage 25 octagon barrel
Stevens 27 octagon barrel
This is only a single mount. You will need to order two mounts for mounting a scope.