I got a psa upper a couple months ago and noticed it is not black like my lower. It has a faded, purplish tinge to it. It's very noticeable where the line betwen the upper and lower are due to the color difference. It was a good deal and it's a cheap AR, so I wasnt worried enough to complain to PSA. A coworker just ordered an upper from PSA as well. He showed me the pictures and it's the same thing. Way off color from the lower. In his case it's a PSA lower as well (mine wasn't) so that makes it extra curious...