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Can I use .357 sig mags in my .40 Glocks?

Discussion in 'General Glocking' started by hsprincipal, Jan 15, 2013.

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  1. hsprincipal

    hsprincipal

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    Theses are compatible aren't they?
     
  2. KA5IVR

    KA5IVR

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    I believe the mags are the same, besides the markings.
     

  3. arshooterone

    arshooterone

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    hickok45 said they are.
    [ame="http://www.youtube.com/watch?v=bJPU71yZKvA"]Glock 32 Gen 4 - YouTube[/ame]
     
  4. Opie 1 Kenopie

    Opie 1 Kenopie Regular Guy

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    Yes. Think about it, the wide portion of a .357 SIG round is essentially a .40 round. This means same feed lips.
     
  5. dkf

    dkf

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    Only difference between .40 and .357sig mags is the lettering/numbering on the mag and the follower. You can shoot .40 out of .357sig mags and vise versa.
     
  6. hsprincipal

    hsprincipal

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  7. cowboy1964

    cowboy1964

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    It's supposed to work but they are not identical or Glock would mark them with both calibers like S&W does.
     
  8. garya1961

    garya1961

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    How do you know this?
     
  9. janice6

    janice6 Silver Member

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    I use the .357 Sig in my .40 cal mags in a G27 without any issues at all.
     
  10. rdunk

    rdunk

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    I have both, and the mags I have do have a slight difference. On top of the mags, at the rear where the primer end of the round sits against the mag, there is a cutout opening there. There is a slight difference in the cutout angles of the .40 vs the .357.

    I haven't shot the .40 mags yet in the 32c, so i can't attest to them shooting the same. But, I am definitely assuming that they do!
     
  11. maestrogustav

    maestrogustav

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    I'm sure this question is coming up more often, due to the relative availability of .357sig mags-- at least at certain moments during the last days- as compared to .40sw mags.

    I nabbed 4 .357sig mags for use in my G22 and 23, simply because I could get them at normal retail last week.

    I have done the closest visual inspection possible. The followers are absolutely identical to the naked eye.

    I would take pics, but even my nice camera with good lighting can't match the human eye, so if you don't believe, please do your own inspection.

    I am comparing the LATEST versions of these. I can make no claim as far as earlier versions, and I don't even know if the followers have ever changed.
     
    Last edited: Jan 16, 2013