Ruger American Rimfire Rifle Picatinny Rail Black Hardcoat Anodized. The one-piece design is precision-machined from billet aluminum and the rail is 6" long with a hardcoat anodized finish making it extremely durable and long lasting. The Ruger American Rimfire Rifle Picatinny Rail will work with the American Rimfire rifle receiver and the rail is engineered specifically to fit the gun's scope ring holes. This Ruger American Rimfire Rifle Picatinny Base accepts Picatinny or Weaver scope rings and the rail is 6" long with a hardcoat anodized finish making it as long as you want your rifle to be. Specifications for Ruger 90674 American Rimfire Rifle Picatinny Rail Black Hardcoat Anodized: Manufacturer: Ruger Finish: Black Hardcoat Anodized Fabric/Material: Aluminum Gun Type: Rifle Length: 6 in Additional Features: 1 Piece Condition: New Attachment Type: Screw Package Contents: Ruger 90674 American Rimfire Rifle Picatinny Rail Black Hardcoat Anodized Ruger 90674 American Rimfire Rifle Picatinny Rail Black Hardcoat Anodized