WarneA(R) Vapor 2-piece Bases are machined from solid 6061 aluminum and feature cross-cut Weaver/Warne slots that can handle heavy recoil. Quality-made in the USA. Fits RugerA(R) AmericanA(R) centerfire rifles 6061 aluminum alloy with matte black anodized finish Compatible with all Weaver/Warne-style scope rings Cross-cut slots can handle heavy recoil Made in USA Order today!