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Old 11-13-2012, 17:04   #1
billiardcue
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9mm to .357 conversion

40 cal & .357 Glocks can be converted to 9mm.

Can it be done the other way? G17 9mm to shoot .357?
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Old 11-13-2012, 17:14   #2
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Quote:
Originally Posted by billiardcue View Post
40 cal & .357 Glocks can be converted to 9mm.

Can it be done the other way? G17 9mm to shoot .357?
Maybe,
But even if you can, you really don't want to.
It's usually better to just get a second gun.
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"The frames of the 26/27/33/39 are all the same.
You can convert a 26 to a 27 by installing a complete top end and switching the trigger housing from 9 to 40. You will also need a 27 magazine."

Last edited by barth; 11-13-2012 at 17:23..
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Old 11-13-2012, 17:41   #3
serger
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To go from a 9mm to the 357 Sig you need a different slide, barrel, ejector and extractor. And mags. the frame doesn't care but you are looking at the cost of a gun for the parts unless you wait and look carefully. the conversion is easy. I went from 40S&W to 9mm. That was easier.
Get a Glock 22 upper and then just get the 357 barrel and you've got 3 calibers. Down side is you bought 1 and a half guns worth of parts to do it +/-. You'll still need the ejector and mags for this conversion.

Last edited by serger; 11-13-2012 at 17:42..
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Old 11-13-2012, 18:23   #4
Bruce M
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I am reasonably sure that a good gunsmith could open up the breach face of the G17 slide. Then it would need probably need a conversion barrel to fire 9mm. Probably wouldn't cost much more than just buying another gun, but it might be a great solution if, for instance, someone was where they cannot import another pistol.
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Old 11-13-2012, 20:04   #5
G26S239
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Quote:
Originally Posted by Bruce M View Post
I am reasonably sure that a good gunsmith could open up the breach face of the G17 slide. Then it would need probably need a conversion barrel to fire 9mm. Probably wouldn't cost much more than just buying another gun, but it might be a great solution if, for instance, someone was where they cannot import another pistol.
Glock 22/31 has a slide about 1.2 ounces heavier tha a 17.
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Old 11-13-2012, 22:48   #6
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Quote:
Originally Posted by billiardcue View Post
40 cal & .357 Glocks can be converted to 9mm.

Can it be done the other way? G17 9mm to shoot .357?
Not without prohibitive cost and potential difficulties. It would be more cost effective to just purchase a .40S&W/.357sig pistol that you can then easily convert to 9mm.
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Old 11-14-2012, 05:13   #7
DannyR
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Best way to convert a 3-pin 9mm Glock to 40 or 357 would be:

1. Buy a complete upper
2. Buy appropriate magazines
3. Change the ejector

Don't even think about it with a 2-pin 9mm Glock.

Milling a breechface may prove costly and then you also have to enlarge the nose ring so that the barrel will fit.
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