• alcoholicorn
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    9 months ago

    OK, so there is a 5.7mm, that’s the same diameter as 5.56/.223, but it’s not compatible with either because of the french.

      • alcoholicorn
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        9 months ago

        Kinda?

        The case is both shorter and narrower than 556/223, so it won’t even sit right in anything not designed for it. But FN makes quite a few guns that use it.