The barrel has worked well for me, I've even managed some respectable groups with it, although I have no clue what chamber or twist it runs, no roll stamp. I don't have a precise way to measure the gas port, but best I can come up with would be about .076", does that sound close? If I'm sticking with the same bolt/barrel that was in the original receivers, does my headspacing stay the same? I think I read somewhere that the bolt should stay with the barrel. I've avoided any real 5.56 in it since I don't know the chamber, there's a local guy that's done some work for me in the past that would probably have that go/no go chamber gauge, I'll have to get with him.




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