The Ruger 90674 Picatinny Rail is a genuine Ruger Factory Accessory crafted from black hardcoat-anodized billet aluminum to provide a durable, precise mounting solution for Ruger American Rimfire rifles chambered in .22 LR. Designed to fit the receivers factory scope mount holes, this one-piece base offers MIL-STD slot-and-rail spacing that accepts Picatinny or Weaver scope rings, ensuring compatibility with a wide range of optics. Measuring six inches in length, it delivers solid, consistent alignment for dependable point-of-aim performance and repeatable accuracy across field use and range sessions. The rigid construction, together with the included TORX mounting screws and T-10 wrench, supports secure, workshop-like installation that stands up to the recoil and environmental demands typical of small-caliber rifle applications. This rail is optimized for those seeking a streamlined, factory-backed upgrade that maintains the rifles inherent ergonomics while expanding mounting versatility for optics, red dots, or scopes. Made in the USA, the Ruger 90674 provides a trusted, purpose-built base that enhances mounting reliability and long-term service in hunting, sport shooting, and rugged field use.