Picked up my brand new Classic Black PTR 91 today. At first glance, beautifull. Nice welds, awsome finish. When I got it home to field strip and clean prior to first shooting, I noticed the inside of the receiver had LOTS of red rusty corrosion everywhere. Only the receiver insides are corroded. Not the bolt group, cocking tube or barrel. Spent a good hour trying to clean it up. This thing appears to be beyond my repair. Too many nooks and crainies I can't get. Ive treated more than my fair share of corrosion after spending more than 20 years in the Navy. I'm pretty sure PTR wont be able to repair this thing to my satisfaction. Corrosion in places that are untreatable. Can anyone tell me what I may expect from PTR customer service ?