I've good exprience with Mossberg customer service once I finally made it past the automated greetings and such.
Only downside is they aren't big on communicating past the intial contact.
As in, I talked to them, shipped my gun to them, and didn't hear anything out of them until the FedEx guy came knocking at the door.
NRA Life Member
"Boy Scout Problem #18: Living with the fear that one day someone will find out you can't tie anything more complicated than a square knot."