Not claiming to have the answers here, but just throwing in what I do know.
So the rifle length system was said to operate at 12,000psi when I first learned about the M16. It was one of those stupid learning tricks. 12k at 12 inches. Now the number I commonly hear is 15k for rifle and 26k for carbines. Gonna assume that is due to hotter ammo, heavier projectiles,...
So for your question. We'll say the gas port of the rifle is exposed at 15k. Gas travels through the gas port, around the corner, down the gas tube, through the carrier, and into the bolt carrier bore. Whole lot of variables there for volume, drag, temp, ... Does any of that matter? In my kindergarten level understanding of gas flow dynamics the answer is no, the pressure should be relatively constant in all areas of the gas system during the dwell period. I'm willing to accept that that is not completely accurate and that it is more complicated than that, but this is my "operating knowledge". What I don't know is what that "universal" pressure is. I would not be surprised to find out that there is not complete equalization to bore pressure but I'm not going to speculate.
All that said, I'm in for some skoolin' once the experts chime in. Considering that Clint whom you quoted is about as expert in AR gassing as it gets, I'll put my chips on his answer for the win.
Last edited by utahjeepr; 07-25-21 at 09:03.
Go Ukraine! Piss on the Russian dead.
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