Blackpowder Products Medium Durasight Z-2 Alloy Universal Two-Piece Integral Bases/Rings Sytem for Center-Fire Rifles (Black) Durasight Z-2 Alloy Universal Two-Piece Integral Bases/Rings Sytem for Center-Fire Rifles - Medium (Black) Fits 2008 and Newer Winchester 70 Long & Short Actions using 8x40 mount screws