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Old May 23, 2021, 02:08 AM   #3
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Join Date: March 2, 2014
Posts: 8,899
I've read about it on forums-- but I've never had an AR barrel that was "under gassed"--usually they are at least slightly overgassed (there's a reason why there's been a proliferation in adjustable/tuneable gas blocks made). McGowen has made some AR10 barrels for me the same length as the one you are getting--I usually specify rifle+2 gas length; what are you getting? Unless you're firing a reduced load (which has it's own safety issues) I wouldn't sweat it (at least until you've actually fired it)--especially if the GS guy doesn't have the same set-up and experience with it. One area that builders often overlook IMO when putting AR 10's together is the quality of the bolt and firing pin--it pays to spend extra bucks on these to get something like JP's high performance bolt and firing pin.
If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; May 23, 2021 at 02:21 AM.
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