
Originally Posted by
MistWolf
Colt first submitted the XM4 (the M4 prototype) for testing with a .062" gas port and had reliability trouble with one of the types of ammo. They opened up the gas port to .0625 and "it was determined that this gas port diameter performed well in cold temperatures with no carbines failing due to 'lack of power.'"
So in testing, they found a small change made a noticeable difference
How is gas pressure inside the system and what percentage of a difference does .005 make? Im genuinely curious.
“Answer The Bell...” J.W.
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