This Ruger manufactured fifth variation 4 5/8" long blue finished barrel is for the later new model Single Six single action revolver with an adjustable style rear sight and is in very good condition retaining the majority of its original blue finish with some thinning from holster wear and honest use. The bore is bright and rates excellent.  (file photo)

Markings: This barrel has the later markings: Before Using Gun - Read Warnings in INSTRUCTION MANUAL Available Free From / Sturm, Ruger & Co., Inc. Southport, Conn. U.S.A. on the left hand side.