text: In reply to message77570: Over the last few years Aero’s QC has gone down hill. Their barrels are over gassed. If the lower receiver was stamped with Tacoma, WA then it’s probably ok but if it’s stamped with Lakewood, WA then I’ve heard of them being out of spec. I have a few Aero builds and they run pretty good. My AR10 is probably the worst out of them all. I’m switching to companies like Sons of Liberty Gun Works, Centurion Arms, etc. Half of my Aero builds have Sons of Liberty Gun Works barrels. Aero used to be a quality budget rifle but due to QC issues my friends have had, I’m dumping them and spending a little more money. To be clear, I’ve built all of my ARs, they are not store bought complete rifles.