check to see if your tappet plate (this is the long stem that pulls your air nozzle back and forth after every shot and is driven by the sector gear, or the "gear with half the teeth on it") spring is in, and that your tappet plate slides freely. If that is malfunctioning, you will see bbs getting shot into the barrel, but not exitting the gun, because all of the air power is escaping out of the feeding tube into the magazine.
I've had a friend whos tappet plate actually cracked in half, so check your tappet plate!
good luck!
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