Introducing the one-piece Picatinny scope base, tailor-made for Ruger American Rimfire rifles chambered in 0.22LR. This 0 MOA rail is meticulously crafted to fit seamlessly into the American Rimfire factory scope mount holes on the gun's receiver, ensuring a secure and precise fit. The MIL-STD Picatinny slot-and-rail spacing welcomes both Picatinny and Weaver scope rings, offering you versatile mounting options for your optics. Precision machined from billet aluminum, the base boasts a robust and durable one-piece design. Its hard coat anodized finish further enhances its resistance to wear and tear, guaranteeing long lasting performance. The base measures 6 inches in length, providing ample space for mounting your preferred optics. The package includes (4) TORX mounting screws and a T-10 wrench, making installation a breeze. As a Genuine Ruger Factory Accessory, this Picatinny scope base embodies the renowned Ruger commitment to quality and craftsmanship. Manufactured in the USA, this base is a reliable and essential addition to your Ruger American Rimfire rifle, elevating your shooting experience with enhanced precision and performance.