Blackpowder Products Medium Durasight Z-2 Alloy Universal Two-Piece Integral Bases/Rings Sytem for Center-Fire Rifles, Fits Savage110/112 (Black) Durasight Z-2 Alloy Universal Two-Piece Integral Bases/Rings Sytem for Center-Fire Rifles - Medium (Black) Fits Savage110/112 with round rear bridge - med hight fit 40mm scopes and under.