Jay British finds an old video that might be helpful for you in taking care of your airsoft AEG gearbox... "A very old video some years back, so thought I would share with you. Gun had stopped firing but gears started making the noise that every player hates. A lot of people fear fixing there own guns and yet there is not much really inside to be scared about, this player has never stripped a gun. So we made this video to help him at the time in case he had to repair it again anytime in the future."