The new P220 Carry has an internal extractor, but it's NOT the same as they've used since 197x.
The new style stainless slides with integral breech blocks use a different, often problematic extractor. Many times, from the factory the extractors on the new-style Sigs have improper tension and the claw lacks the proper radius.
This results in the famous Sig failure to go into battery.
I speak from experience.
I really love Sigs, but I'd stick with an older, folded-steel slide made in Germany model.
FWIW, Sig should make right on any issues, but QC has slipped in recent years.
Good luck.