The prodigal rifle has returned. The very persistent FedEx guy pounded on the door long enough to get me up (been working weird shifts...) and had a nice long brown box for me. The paperwork only says "updated to current specs," but most importantly there's an extractor once again and everything looks good to go. That was a pretty quick turn around too, FedEx says they received it last Wednesday.
Hopefully I'll be able to get out to the range Thursday or Friday after classes, or failing that Saturday. Hopefully it doesn't blow up again.