To check airseal turn the gun upside down with no magazine in it. place one bb in the feed tube. The nozzle is already in the hop bucking and a perfect airseal should not move the bb in feed tube. Fire once and if bb moves you found a problem, what component? Nozzle and/or hop. If its your piston head or cylinder head the fps is inconsistent, chrono to find that out.
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Con Murder
Dark Rhino
L.A. Airsoft
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