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  1. #1
    ronmail65 is offline Member
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    Glock 19 - conversion to S&W 40?

    Does anyone know if this is possible? Has anyone ever done this?

    If so, is it as simple as new spring, barrel and magazine? If it's not that simple, I wouldn't do it. What about cost for these parts?

  2. #2
    Cat's Avatar
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    Cat is offline Member
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  3. #3
    rgrundy's Avatar
    rgrundy is offline Member
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    The diameter of the case head of the 40 is bigger so it won't be an inexpensive project.

  4. #4
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    VAMarine is offline Administrator
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    Unless I'm mistaken, while you can change a .40 to a 9mm, you can't change a 9mm to a .40. While the guns are about the same size, the interior dimensions of the 9mm will not handle the .40. Take a look at those links Cat posted, you won't find a single .40cal barrel for a Glock 19.

  5. #5
    DJ Niner's Avatar
    DJ Niner is offline HGF Forum Moderator
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    The only way to make this work is to get a full .40 caliber top half (barrel and slide assembly) of the same length, and a .40 ejector housing for the frame. Assuming your 9mm is a later-production 3-pin frame, a new .40 top end and ejector housing would turn it into a .40.

    As said above, the breechface on a 9mm slide is too narrow to allow a .40 case to slide up and sit against the breechface at all, so a new slide and barrel is required to make this work.
    "Placement is power" -- seen in an article by Stephen A. Camp
    (RIP, Mr. Camp; you will be remembered, and missed)

  6. #6
    ronmail65 is offline Member
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    Quote Originally Posted by VAMarine View Post
    Unless I'm mistaken, while you can change a .40 to a 9mm, you can't change a 9mm to a .40. While the guns are about the same size, the interior dimensions of the 9mm will not handle the .40. Take a look at those links Cat posted, you won't find a single .40cal barrel for a Glock 19.
    Thanks for all the posts!

    Based on the above, it sounds like I got it backwards.

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