We are on the same page, the downward pressure (from the BCG) is already there, essentially the magazine spring is the only thing resisting this. But since there is a "stack" of ammunition above it there is a "moment of inertia" (column inertia) that takes a bit of time to "get moving". Hence why I said that a "just under full" magazine should be the most prone to this. Essentially the same effect as a mag spring that has lost some tension and is beyond service limits. It cant push the "column" of rounds up fast enough. I believe that a BCG velocity that is extremely high could duplicate the same effect. After all Mr. Stoner had to have had a "spec" for minimum magazine spring tension. He would have based this on a 20" barrel and rifle buffer. Compare the BCG velocity of:
16" (carbine gassed) barreled Semi auto carrier with a carbine buffer.
20" (Rifle gassed) barreled M-16 carrier with rifle buffer system.
I dont know the "numbers" but it wouldn't be hard to figure the carbine velocity much higher...
In the simplest terms, if anyone can believe an old worn out mag spring can cause the same malfunction, then you must also believe an "in spec" mag spring can fail to be sufficient if the spec it is "up to spec" for was written for a very different configuration (20/rifle/auto carrier, etc. vise 16"/carbine/semi-auto carrier)
You bump your head? 15:00 is "3 o'clock" which would be straight out the ejection port in a straight line to the right of a right handed shooter.
Or are you messing with me and im too tired to comprehendo?![]()




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