On a positive note, Bud's already CALLED me directly and let me know that while they can't replace it since I already did a transfer on the weapon... Mossberg should replace the sight or barrel if necessary.
Bud's also told me that if for some reason Mossberg wants me to pay for shipping, just let them know and they will provide a shipping label for me at no charge... so that's cool. I've heard both good and bad about Bud's customer service, but I was definitely pleased with that.
I'll keep everyone updated on what happens.
Glock 19 G4 BFG | Glock 17 G4 FDE | S&W M&P 22 | S&W M&P 45 | S&W M&P Shield 9 | Ruger GP100 4" | Sig P226 MK25 | Sig P229 Extreme | Sig P320F | Sig P320C | HK USP 9 | HK USP 45 (Tan) | Walther PPQ 9
Daniel Defense DDM4 V4 | Arsenal SGL 21 | ASA SBR | Savage Mark II FV-SR
Mossberg 590A1 20" SP | Mossberg 500 Cruiser