DESCRIPTIONLeupold%20BackCountry%20one%20piece%20cross-slot%20scope%20bases%20are%20made%20from%20high%20quality%207075-T6%20aluminum%20and%20they%20feature%20a%20hard%20coat%20anodized%20matte%20black%20finish.%20Each%20mount%20is%20compatible%20with%20either%20Weaver%20or%20Picatinny%20style%20rings.%20Each%20base%20is%20painstakingly%20designed%20by%20the%20Leupold%20engineers%20to%20fit%20a%20very%20specific%20set%20of%20receiver%20types.%20Please%20see%20below%20for%20the%20fitment%20guidelines.Specifications%20and%20Features%3ALeupold%20BackCountry%201-Piece%20Cross-Slot%20Scope%20Base%20171354Weaver%2FPicatinny%20CompatibleOne%20Piece%20Base7075-T6%20AluminumHard%20Coat%20AnodizedMatte%20BlackFits%3AWeatherby%20Mark%205%2FWeatherby%20Vanguard%20Long%20Action%20Calibers%2FReceivers