One Piece Picatinny Scope Rail; Machined to mil spec tolerances; Constructed from 6061 aluminum, hard coat anodized for a lifetime of service; Works with Henry 30-30 and the 45-70 rifles (Not compatible with Henry 38/357, 44 Mag, and 45 Colt receivers); Includes mounting screws; 100% Made in U.S.A. with a lifetime warranty; 6.0 inches overall length; Weight 2.8 oz.