The Midwest Industries Marlin rail is a one piece hard coat aluminum scope mount for your Marlin or Henry rifle. Features: One Piece Picatinny Scope Rail 6.0 Inches overall length Machined to mil spec tolerances Constructed from 6061 aluminum, hard coat anodized for a lifetime of service Includes mounting screws 100% Made in U.S.A. Works with Henry 30-30 and the 45-70 rifles (Not compatible with Henry 38/357, 44 Mag, and 45 Colt receivers) Weight 2.8oz