Leupold BackCountry, 1 Piece Base, Fits Savage 10/110 Short Action Round Receiver, Matte Black 171336 Leupold BackCountry cross-slot bases are made of 7075-T6 aluminum, making them some of Leupold's lightest and most rugged mounts yet. This BackCountry cross-slot base is designed to fit a Savage 10 Round Receiver Short Action and accepts both Picatinny- and Weaver-style rings.