The 11-43 barrels are very common on the last batch of S'G' carbines in the 3.6 million range. I have 3.639 million S'G' that also has the 11-43 Inland barrel. I still don't know who marked stocks with the serial number under the buttplates. If you bought this carbine for the price of a SG you did very well. The stock is a field replacement item.
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