Maybe it's the QC, maybe not. Here's what I'd do in your shoes.
Call Remington's toll free line. Log each interaction and get the name of whomever you talk to. Find out what they want you to do with the shotgun,where to send or take same. Do as they say and log date and time. Again, keep record of whom you communicate with.
Also,note any discrepancies in what you're told.
Please keep us posted,your experiences may help another forum member.
There's been speculation that Remington, who advertises in the parent publication of TFL, may have a loose monitoring of this BB going on. This may help them stay motivated.
The 11-87 started off with some probs, and have gotten somewhat of a bum wrap as a result. Most of the probs have been resolved, maybe this is a one in a million shot.