Originally Posted by zeke4351
You can buy a 9mm conversion barrel and use your .40 mags but don't use it for carry and let your life depend on it. If you do some reading you will find that this is not a 100% setup and will fail many times but is ok for the range. The P229 with a German frame uses a different exchange kit than the newer Exeter frame. Osage County guns has lots of good Sig info on their site and you can learn a lot there.
+1 on Osage. Great retailer and knowledgable employees as well. I bought 4 SIGs through those guys, my two and my sisters' as well.