Originally Posted by
farscott
The last new 870P guns I have seen come with the polymer-based trigger plate. From what I can tell, the polymer is a product improvement as it holds tighter tolerances and is a bit more resistant to abuse. It is probably a cost reduction as well.
The QC issues I have witnessed on 870P guns are sights not properly oriented and barrel rings not secured to barrels. Looks like the barrel ring attachment method went from silver solder to some adhesive, and I have seen guns where the barrel ring just falls off the barrel.
Personally I have experienced no issues related to the MIM extractor versus the milled extractor. In both cases, cheap ammo (Remington Gun Club) causes failures to extract, and decent ammo functions fine.