Add the Leupold BackCountry Cross-Slot 1-Piece Base for Weatherby Mark V LT Rifles to your rifle. This matte-finished base is made of aircraft-grade aluminum for lasting strength and is designed to fit Picatinny and Weaver-style rings. Leupold BackCountry Cross-Slot 1-Piece Base for Weatherby Mark V LT Rifles Black - Scope Rngs And Rifle Accessories at Academy Sports