High quality receiver and the anodization is absolutely top-notch - Grey Ghost Precision Forged Upper Receiver

Receivers are perfectly machined. Finish is not standard milspec anodizing. It is much more like my Wilson Combat and Noveske sets. Highly recommend the for any builds. There is a major difference in quality between one of these and say, an Aero upper. Don't get me wrong, I love Aero, but this guy is on another level. Their jet black, rich anodizing is part of what makes it. High quality paired with stellar customer service makes Grey Ghost a big win for me. Will be buying more.