Had to trim the barrel nut just a tiny bit with a hand file because it was just slightly too tight, but it's solid as a rock. One could also just grab a second barrel nut, as it just sits on a standard one, and VFC uses a threading that is to spec or close enough to real AR receivers.
I probably would have gone with a 9" if it had been available on Boxing Day. I like the look of 4" or so of barrel protruding from the handguard with a nice gas block and muzzle device.
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