I want to get a threaded 9mm barrel to run in my P239 which is currently setup for .357 SIG. Do I need a different spring, or can I just swap the barrel and mags?
I haven't been able to find a conversion kit, but any recommendations would be appreciated!
there are 9mm "conversion barrels" that will work in a 239 of another caliber (I have one for my .40 239SAS); but I don't know if a regular 9mm barrel will work. Maybe someone else knows...
If the barrel works - you don't necessarily need other springs and stuff. At least that's the case for my conversion. I can use the .40 springs and even the .40 magazines if I want.
Ah ha, I seem to remember some confusion along those lines, which is why I didn't do this the last time I had the question.
Can anyone confirm a threaded 9mm barrel that will work in a .357 SIG P239?
check about 5 threads below this one - they're talking about using non-conversion barrels - and it works for some guns...
See my post here. Substitute .357 for .40:
Many, including myself, have successfully used Sig OEM native 9 mm barrel rather than a Bar-Sto or Fire Dragon true 9 mm conversion barrel.
I know my .40 mags feed the 9 mm just fine. However, since the P239 uses different mags for .40 and .357, you may or may not be able to use the .357 mags for 9 mm.
Finally, since you mention threaded barrel, I presume you will want to use a can on it. Don't know if that will make any difference in reliability using a Sig OEM native 9 mm threaded barrel. Haven't seen anything regarding this on the SF.
An expert is one who knows more and more about less and less until he knows absolutely everything about nothing. --Nicholas Murray Butler
My 239 in 357 functions well with the factory 9mm barrel and 357 magazines. Sluggish, but functions.
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The 357/40 slide (right) is taller and heavier, so use the lighter 9mm recoil spring.
I use a factory 9mm threaded barrel in my P239 .40 with no problems. I don't change anything but the barrel and it functions flawlessly.
Edited to add that using the taller slide of the .40/.357 allows you to see the sights if you use a 1.25" diameter suppressor. Just FYI.This message has been edited. Last edited by: Tusk,
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