I picked up a used 25-2 with the barrel cut to 4 inches with a screw on ramp sight for IDPA use. I want to restore it to stock. I see a barrel in the Gun Parts catalog listed as 6 inch. I really want an original pinned barrel at 6 1/2 inches. Is this a misprint or did they make 2 lengths for the auto rim? If S&W did make 2 lengths, where is the best place to get a 6 1/2 incher?