Convert a sig 239?

Zorros · Oct 5, 2018

I saw a consignment 239 in .40. The only caliber markings were on the barrel and i was told the 357 and 40mags were he same. I dont recall seeing a caliber marking. Seller said he might have a 357 barrel for it. Anyone convert a 40 to 357...sig 239 specifically. Thanks.

Gcs7th · Oct 5, 2018

I know this is true for the P226. I can’t imagine it being much different for the 239.

Hawkeye · Oct 6, 2018

All you need to do is swap the barrel to go from .40 to .357 and back again in any of the classic P-series SIGs. Mags are the same. You can't go 9mm as easily, (OD of the barrels are different) but .40 / .357 is easy.

SWO Daddy · Oct 6, 2018

Yes I did this on my P239. No issues.

Zorros · Oct 6, 2018

Thanks, everyone. Much appreciated.

jonb219 · Oct 6, 2018

This post gave me some ideas for my P226. I'd like to get a .357 Sig conversion barrel. ...FWIW, I saw this note on the Midway USA site:

With these Sigarms factory barrels, you can convert your 40 S&W to 357 SIG. These barrels are made of blue chrome moly steel. If converting the P239, a new magazine will be required (sold separately). Other models require no magazine change.

Convert a sig 239?

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