Update: shot the MMC AR-15 today for the first time. Out of seven shots, one cycled correctly. I was appalled. The issue was that the spent brass would start to eject, then get caught in the chamber cocked slightly to the right, thus keeping the bolt open. (See pic). I then shot 3 shots using my buddy's Noveske bolt carrier group in my AR, and it functioned flawlessly. With all shots I shot a 3 in group at 25 yards. I will be contacting MMC after the weekend. As soon as this thing is fixed I'm selling it. Any ideas on what is causing this?
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