Leupold Standard Two Piece Rifle scopes Mount Bases are built for maximum accessibility to the magazine or breech area of your rifle. Leupold 2 Piece STD Winchester 70 Scope Mounts are worth checking out. Fluted for a custom look, these bases are also ideal if you're after greater flexibility when it comes to mounting options for your bolt action Winchester rifle. Reversible bases are available for many actions, accommodating a variety of scopes and action lengths. Additionally, the Leupold 2 Piece STD Winchester 70 Scope Mounts fit right-hand and left-hand actions.