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  1. #1
    JCOutlaw
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    Default Question re: AR-15 cartridge magazines

    What's the difference between a 5.56mm and a 7.62x39 cartridge magazine? I'm trying to figure out how to tell the difference in dimensions between the two sizes of magazines because I have several unmarked AR-15 magazines. Thanks.

  2. #2
    Grand Master Know It All 68Charger's Avatar
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    Oct 2008
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    the 7.62x39 mags have significantly more "curve" to them.. since that round is more tapered than 5.56... I believe external dimensions are very similar, aside from the overall curve of the mags.
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