Sig P226 conversion inquiry

[GoldStar]

Hello,

I purchased a Sig P226 in a .357 sig configuration and I'm planning to buy a .40 CAL barrel. Does anyone know for sure if the .40 CAL barrel interchangeable with a .357 sig configuration?

Thanks in advance

[C.G.]

From .357 to .40 no problem. Get a decent conversion barrel so that the chances of having to fit it would be minimal. Mine is a Barsto barrel and they used to fit it for free except for shipping if you bought one of their barrels. BTW, I prefer the .357 over .40.

[abcollector]

So is that to say you can't go from a 9mm to a .40 S&W or a .357 Sig? Just .40 S&W and .357 Sig can be converted?

[BKinzey]

So is that to say you can't go from a 9mm to a .40 S&W or a .357 Sig? Just .40 S&W and .357 Sig can be converted?

40 to 357 is a relatively easy swap. 9mm uses different mags and while you can put 9mm in a .40/.357 mag it doesn't work the other way around. I think there would be breechface and extractor problems too.

[unusedusername]

9mm has a smaller outer diameter of the barrel.

A .40/.357 barrel won't fit in the hole in the front of the slide.

[NikePenguin]

Sigs also use the same recoil springs for 40 and 357. 9mm spring is different.

[sigstroker]

From .357 to .40 no problem. Get a decent conversion barrel so that the chances of having to fit it would be minimal. Mine is a Barsto barrel and they used to fit it for free except for shipping if you bought one of their barrels. BTW, I prefer the .357 over .40.

Just order a new .40 barrel from SIG. Then you won't have to worry about fitting problems.

[SeanCasey]

Hello,

I purchased a Sig P226 in a .357 sig configuration and I'm planning to buy a .40 CAL barrel. Does anyone know for sure if the .40 CAL barrel interchangeable with a .357 sig configuration?

Thanks in advance

Just get the sig barrel and you are set. I bought a .40 and bought the Sig .357 barrel. Between the two calibers you only need a barrel change. Same mags, same springs, same everything except the barrel.

Sent from my SGH-T999 using Tapatalk 2

[NikePenguin]

You may want to consider the content in this thread before converting:
Front sights for P229 40 vs 357

[GoldStar]

Just order a new .40 barrel from SIG. Then you won't have to worry about fitting problems.

Thanks for the info.

[GoldStar]

From .357 to .40 no problem. Get a decent conversion barrel so that the chances of having to fit it would be minimal. Mine is a Barsto barrel and they used to fit it for free except for shipping if you bought one of their barrels. BTW, I prefer the .357 over .40.

I didn't minded .357, it's the price of the ammo that concerns me. Thank you very much with the info. If I only knew someone that has a p226 in a .40 cal I would have tried it myself. I have a p226 in 9mm configuration and the barrel fit perfectly with my .357. Again, appreciate for the info.

[GoldStar]

You may want to consider the content in this thread before converting:
Front sights for P229 40 vs 357

Thank you for the info. I might consider waiting until anyone of my friends would have a .40 P226 and see if he would let me borrow his barrel.

[GoldStar]

Thank you all for the information. I appreciate it.

[gundad]

So is that to say you can't go from a 9mm to a .40 S&W or a .357 Sig? Just .40 S&W and .357 Sig can be converted?

I bought the CALX 226-40-BSS-10 conversion kit and now my 9mm runs 40. Its an entire new slide and barrel and mag. They suggest only doing it for a newer model or you may have a problem with fit. Then you can get a .357 barrel and have all 3 calibers. Cool thing is the kit comes with night sights.

[C.G.]

Just order a new .40 barrel from SIG. Then you won't have to worry about fitting problems.

Haven't been to the Sig Forum lately, but there have been instances with Sig barrel fitting problems
mentioned there.