I got an upper from them before BCM came into the game. Out of the box, the barrel nut wasn't tightened to spec and the barrel wobbled slightly left and right (the gas tube prevented it from spinning free) after firing a couple hundred of rounds. This was unacceptable. However, once I got it tightened down, it functioned well without any serious issues for thousands of rounds. I did put a BCM extractor insert/spring upgrade in and ran it with a H-buffer in the lower.
I have since retired that upper to a back-up position, since I use my BCM as the primary (and never looked back). As others have said, there are many other high quality options today out there...



sort of kidding but mostly not!

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