Frank I bought that same magpul upper and a blem lower from there a couple weeks ago. Except mine came with feed issues. I emailed them about it and they emailed me a return shipping label for the upper. They said it would take about 3 weeks to fix once they get it, and they'll either send it back to me fixed or send me a new one. I like psa and have 100% faith that they'll make it right. Even if I have to wait an extra month, a 725$ ar10 out the door works just fine for me. Here's that email... Minus the pics.
""Hello, I just purchased this upper and this lower from PSA. I took a couple Pmags (LR/SR Gen M3), went to the range and shot about 25 rounds total with 3 different types of ammo.
Hornady 150 grain SST (#8093)
Hornady 165 grain BTSP Interlock (#8098)
Federal Fusion 180 grain bonded SP
I had the same issue with all three. If the first round would fire the next few would cycle fine (I used both 20 rd magazines and would only load and shoot 3-5 rounds in the magazine at a time). Half of the time, when I would load a fresh magazine, the bullet wouldn't fire when I pulled the trigger. I would release the charging handle and press very firmly on the forward assist and the bolt seemed to lock in place and the hammer dropped but the firing pin wouldn't touch the primer. I noticed the casings were getting scraped up on the sides and there was brass scrapings inside the receiver. This is what it looks like. What should I do??? ""