I was curios about the quality of PSA's uppers for a 300 pistol. I have been dealing with PSA for years when buying ammunition and numerous small parts but I have never purchased an upper or a complete gun from them and have never had much time behind one. How is the quality of their barrels? What forging marks are on their uppers? I'm looking at an 8.5" or a 10" barrel. it's a nitrided inside and out setup with no chrome lining which for a semi-auto, I prefer. Can anyone give me any insight?