Data Request

[Garnett]

I have received on Data Request Sheet from someone who purchased my book.  He has a combination gun of .30-30 and 16 gauge x 28 inch, which is a Model 222.  All assembly numbers on both barrels, frame, and a single shotgun forearm  match.  Was the rifle forearm lost at some point in time?  I hope to get more feed back from readers to determine if sets such as these left the factory that way with just an extra barrel ordered and shipped with matching numbers with only one forearm.   There are so many questions and not many answers so far.  Thanks to all of you for any input!