Like Jimmy said ... are the barrels lost, or did you or can you retrieve them from the party in whose car they were mistakenly left?

Your personal first-hand experience is worth posting. As for vaguely suggesting an array of other problems that others may or may not have had with this gunsmith -- second-hand or third-hand or multiples thereof -- I have no respect for this. You're dealing with a man's livelihood. Apparently he was good enough for you to trust with this work despite whatever problems we're supposed to conjure up in our imaginations.