[Troy T. Moore]

The nozzle is maintained in a forward position by the spring inside the gearbox that either pushes or pulls on the tappet plate. The nozzle can "stick" a little in the hop up chamber due to a variety of reasons (slight misalignment, foreign particles=dirt) thus preventing it from sealing against the bucking as it should. I LITTLE spray of silicone oil "up" the hop up (turn the AEG upside down, so you are spraying down) does wonders in my experience.