One Piece Picatinny Scope Rail 5.0 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. with a lifetime warranty Also works with Henry 38/357, 44 Mag, and 45 Colt receivers Weight 1.6oz Mfg: Midwest Industries, Inc.