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.

Fits:
H&R 65, 165, 150 and 151 auto, front or rear
H&R 250, 251, 264, 265, 365, 450 and 550, rear
Marlin 88, 89 and 98, front or rear
Remington 12A, rear
Remington 121 with 3/4" and 3/16" barrels, rear
Remington 12C octagon barrel, rear
Remington 25, rear
Stevens 416, rear
Winchester 43, front or rear

Note:
This is only a single mount. You will need to order two mounts for mounting a scope.