I'm filling the mag down, it work very great with the stock valve, good power, but maybe it is because it can't open the nineball valve enough to have power enough to cycle. Would a 190% hammer spring do the job? I was thinking that all an high flow valve would do was to let more gas passe, not that it would make the gun weaker to cycle. If I open the holes on the stock valve to create an high flow valve, will I have the same problem? thank you
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