That extra 1.5" is all the difference in the world.
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Roger that Mark, I know it is....hence my "likely to short stroke comments'. Similar principle though...if he felt like experimenting he could give it a try. If mine will run with shitty ammo with the lightened buffer, his may at least run with good ammo with the lightened buffer.
Here is a good link..
http://www.03designgroup.com/technot...gth-gas-system