Made in the USA this One-piece Picatinny scope base is designed for use with short action Ruger American Rifles. The MIL-STD Picatinny slot-and-rail spacing accepts Picatinny or Weaver scope rings. One-piece design is precision-machined from billet aluminum. The base is 6" long with a hardcoat anodized finish and includes (4) TORX mounting screws and a T-10 wrench.