Weaver

Each Weaver base is machined to the tightest tolerances for a custom fit. They are 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. - Fits: - Mauser Bauer Models 3000 and 4000 (Rear) - Ruger 44 Magnum Deerstalker (Front)