@Tokarev
How did you get them to replace the upper? What did it cost?
I just picked up a second full-size in a trade… debating what to do with it now. Short list is replace the grip with another Prodigy one and blend a new grip safety. Likely a new thumb safety, but this one is actually installed correctly, so, not sure I will or not yet. But that 4.15 upper would be a nice thing to get from them…. Hmm….