With all due respect: I don't see how this proves much if anything. How does his product compare heads up with the real thing? US carbines went the full 6K, some were just cleaned and sent out for issue after the test. So he broke his new gun in 1800 rounds? This is like taking a brand new car, draining all of the oil, and driving it until it seizes up and dies and then telling people it is a great car. Why?? I'd like to hear more about shooting 1" groups at 100 yds with a carbine.