i just purchased a gen 3 32. i was thinking that they had a 23 with the 40 cal barrel and the 357. do they make a 40 cal barrel that you can buy for the 32?

You should be able to use a barrel for a G23. I can't think of any reason it wouldn't just drop right in and work. The extractor and ejector should be the same since the case head diameter are both are equal.

thanks i'll see if i can find a 23 barrel

You could look at aftermarket barrels also.

The Glock factory barrels are generally available through Brownells, Midway USA, etc; as are Storm Lake, Barsto and Lone Wolf. The Glock barrels may be more reliable but are not recommended for cast bullets; Bar sto, KKM and Storm Lake (?) are made in the USA.

The 357 and 40 barrels interchange, 9mm doesnt (although Storm Lake, KKM and Lone Wolf make 9mm conversion barrels to use with a 32.)

Andy

Edited because I forgot about KKM.

Exactly. I'm a Glock armorer matter of fact.

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If I convert my .357 Sig G32 to .40 do I need a different magazine?

You shouldn't need the 40S&W specific magazines for your switch. The 357SIG has the same case head as the 40S&W. As far as the correct magazine followers go......I can't say this is going to be totally reliable. Back in the day....the 40S&W mags and 357SIG were the same for magazines. Some of those mags were actually stamped as such. If you do have problems using your G32 mags in your hybrid for 40S&W then just be ready for possible issues. Don't bash Glock over what you've done outside of factory specs. I just gotta say that as an armorer. Risk is always on the end user.

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OK, thanks. Is using a G23 mag an option then?

Apparently

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Check out Lone Wolf Barrels as well

Get an aftermarket barrel with a fully supported chamber. IMO.