A 48" barrel is very long for a half-stocked New England rifle. If the gun was originally full-stocked, you should be able to see a very faint line running out along the barrel, on each of the two side flats, where the extended forestock covered the lower portion of the flat, while the upper part of the flat was exposed to air above the stock line. Usually above the faint line the barrel is slightly darker, or more rusted with greater patina, due to longer exposure to the elements. Similarly, below the forestock line the barrel should be slightly lighter and smoother, from being protected under the forestock wood for a number of years before the forestock was shortened/cut back to a half-stock configuration. Not all rifles will show this faint line if cut from a full-stock to a half-stock, particularly if the barrel finish has been messed with or cleaned. But a lot of such rifles do have a faint line. I can't tell from your phots if this line is present, but I do agree that a 48" barrel is a little odd for an eastern half-stocked rifle. I doubt your barrel is from an earlier rifle and restocked...the edges of the barrel where the flats come together are too sharp and clean to be from a reused barrel. If it were an older barrel, the edges would be more worn and smoothed. Shelby Gallien