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  1. #1
    LubeckTech is offline Junior Member
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    Sig P239 .40 S&W to 9MM Conversion

    I know someone who wants to convert a .40 P239 to 9MM. I would think the barrel, magazines and slide or at least the extractor would have to be replaced. Has anyone ever done this?

  2. #2
    utahusker's Avatar
    utahusker is offline Junior Member
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    I'm new here and found this old post.

    To change to 9mm, all you need is a Barsto 9mm conversion barrel and 9mm magazines.

  3. #3
    Glock29 is offline Junior Member
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    On a 239/40 You can use a Sig Factory 9mm barrel no need to change recoils spring or mags, the 40 mags work fine.

  4. #4
    chessail77's Avatar
    chessail77 is offline Senior Member
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    CDNN has 9mm P239 factory Sig barrels for under a 100. but I would restrict the use to practice and range only.

  5. #5
    kongzilla is offline Junior Member
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    Quote Originally Posted by chessail77 View Post
    CDNN has 9mm P239 factory Sig barrels for under a 100. but I would restrict the use to practice and range only.
    Is it not reliable to do so?

    I recently purchased a .40 P239 but would really like a 9mm instead.

  6. #6
    chessail77's Avatar
    chessail77 is offline Senior Member
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    If you purchase a barrel designed for the .40/9mm conversion (Barstow etc.) and use 9mm mags with it, reliability should not be an issue.

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