Sturm, Ruger & Company is principally engaged in the design, manufacture, and sale of firearms to domestic customers. Co. has two reportable operating segments: firearms and castings. The firearms segment manufactures and sells rifles, pistols, and revolvers. Co.'s firearms are available in several models based upon caliber, finish, barrel length, and other features. The castings segment manufactures and sells investment castings made from steel alloys and metal injection molding (MIM) parts for internal use in the firearms segment. The castings and MIM parts are sold to outside customers, either directly or through manufacturers' representatives.