I understand that current thought is that a 14.5" barrel is the shortest that works with a mid-length gas system but I'm curious why a 12.5" barrel with a 9" gas system (3.5" of dwell time) would be that much different than a 10.5" barrel with a 7" gas system (3.5" of dwell time) if the gas port was properly sized/opened.
I understand that it would be significantly more reliable with a can on the end but would it work without and still be reasonably reliable?
PS. Grant this is all your fault for letting me shoot your SBR at the group meet.


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