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I suppose this gas gun variable velocity fact is the reason why the WA gigant has such large fps values even on duster; the long barrel means the bb will spend more time in there and thus more gas is expelled.
i can see how this works in a gbb gun, where the gas propels the bb first and then diverted to the blow back function via a valve thingy in the nozzle (WA design for instance), but does this work in nbb guns? the tanaka sniper rifle series has large fps numbers but is that the result of a valve with a set amount of gas coming out or is the gas output variable as in a gbb
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