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Why pistol length gas for 16 inch barrels?
Olympic Arms and Noveske do pistol length gas on their 16 inch uppers. Why?
I can see it being needed for 8-10 inch barrels to add more time between the bullet passing the gas port and when it exits the barrel, but 16 inch would seem to have plenty of that with a carbine gas.
Also, carbine gas should delay the unlocking and have less ejection-port noise and more bolt life (not sure if the differences are significant or not).
And if carbine-length gas was not making enough energy, why not just use a larger gas port?
What is the perceived issue with carbine length gas?
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