The Ruger American Rifle 20 MOA Scope Base is a precision-engineered accessory designed for short-action Ruger American Rifles. Constructed from durable billet aluminum it features a one-piece 6-inch design with a matte black hardcoat anodized finish. This Picatinny/Weaver rail offers mil-spec slot-and-rail spacing making it compatible with both Picatinny and Weaver scope rings. Built to mount directly to the rifle's receiver using factory scope mount holes it includes four Torx mounting screws and a T-10 wrench for easy installation. As a genuine Ruger factory accessory this scope base ensures reliable performance and compatibility. Made in the USA.