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Walther P99. Can I use 9mm mags for .357SIG?

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2 comments

  • madmarc0
    I do not think they will work, I was just talking to a friend at the range and he said that his mag would not feed the .40 round. The lips are too narrow.
    0
  • JudgeColt
    The .357 SIG is based on the .40S&W case, so a .40S&W magazine is needed.
    0

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