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How does the NPAS system work


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Old May 4th, 2015, 17:52   #1
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How does the NPAS system work

Hey all,

Ive never actually got around to posting about this. Ive never really understood how the NPAS system works in relation to restricting gas and impacting the weapons fps. If someone could simply stat how making the stem longer or shorter does anything I'd be able to have a clear picture.

As well, in the included amazing MS pain diagram....does figure 1, or 2 have a higher fps flow? Is figure one open or closed? Im trying to figure out which way to turn the npas once it is in the valve to increase FPS. Take in mind I am talking about a NPAS for a WE Scar/M4 platform.

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Old May 4th, 2015, 18:35   #2
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Old May 5th, 2015, 12:22   #3
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I did an experiment to modify the cylinder bulb with little piece of screw on VFCMP5, it works and reduces FPS. I will try another way, to cut short the firing pin see if it works the same or not? Interesting tho.
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