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Seventh Round Mod. Explained in Pics

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    Seventh Round Mod. Explained in Pics


    #2
    Don't forget the "extra wide rib" receivers, about a dozen known to date, most had the correction. Serials
    run from the late 30K to early 43K

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      #3
      You're right, we need to post some pics of the wide and the extra narrow rib variations too.

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        #4
        Please forgive the newbie question, but what is this "7th round mod" and what does it do? I see some subtle differences but don't understand what the purpose is.
        ​m14brian

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          #5
          Some early rifles had the boring of the barrel bore drilled too deeply which resulted in the 7th round being less than fully supported as it was hit by the bolt. Sometimes it would jam when the cartridge zigged where it should have zagged. It was caught early and most of them were fixed in the arsenals.

          Has me wondering if it isn't kind of like the upside down plane on the postage stamp. Most of those were caught and "fixed" making those that did end up in circulation much more valuable.

          Just another variation of Garands that will be pushed out of my price range.

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            #6
            A few early Winchester receivers were also found like this too. It is also something that is very difficult to fake

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              #7
              This is the kind of stuff you don't think about when you're my age. I was born 18 years after the rifle was placed into service and all I've ever seen is an extremely reliable auto loader. However it's obvious there were growing pains.

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                #8
                Good Day,
                I was cleaning my early Springfield, serial number 6200. It has not been modified to correct the error that occurred during manufacture and led to the "7th round stoppage." It is not in the gas trap configuration.
                Regards,
                Michael


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