I built the rifle for him. As a new manufacturer there is very little I do in house other than assemble rifles. Fastfive wanted a specific look to his rifle and I just wasn't able to get my hands on what he wanted. He found RedX on his own, so I went ahead and ordered him a barrel. I tried DEZ, she didn't have anything SS Fluted. The first sign of trouble should have come when the bolt was difficult to close on a 5.56NATO MIN gauge. I use Forster 5.56NATO MIN and MAX gauges to head space all of my builds. I also test fired the rifle putting 30 rounds through it. It seemed to cycle OK. Long story short, once the problem was verified we set to work replacing all suspect parts, and then moved on to parts you would normally not suspect. Nothing changed. I suspected the brass could be sticking in the chamber causing the erratic extraction. I ordered a 5.56 finish reamer and set about correcting the chamber. Once I got it to close cleanly on the MIN gauge, and verified it did not close on the MAX gauge, I took it back out to test fire. It was now plainly obvious that it was over gassed and the extremely over sized gas port proved it. During this time I contacted RedX 3 times, twice by email and once by phone. As Fastfive said, the only response was, "what kind of ammo". I feel pretty confident that three different boxes of American Eagle AR223 wasn't the culprit. I replaced the barrel with a Del-Ton SS M4 profiel barrel sourced through JSE. I have used Del-Ton parts in the past and have confidence in their product. Amazingly (not really) the rifle functions perfectly. Clean extraction, clean cycling, good shooter!!
Moral of the story, they might get a couple good barrels out but their product is not worth taking a chance on. I strongly suggest nobody purchase their product.
If anybody is wondering, I ate some of the cost of the repair. While it could easily be argued he picked the barrel, blah, blah, blah. In the end it's my build with my name on it and I refuse to allow a poor product to become a thorn in my side. I feel I offered a fair solution, and I hope Fastfive agrees.