Does the trigger feel correct? (both stages feel like they're there)
Try breaking the gun down to inspect the full auto trigger contacts. It should take about 10 minutes:
1) Remove the magazine and battery, leave the butt-stock cap off
2) Slide the receiver pin about halfway out to the right (Square thing just above and in front of the magwell
3) Gently slide the upper receiver forwards off of the stock, set aside. Make sure that you don't damage the inner barrel by knocking it against anything.
4) Look inside the back of the gun, into the battery compartment. There are 2 screws near the top. Undo these, do not lose the screws or the plastic piece they hold in, your gun will not feed properly if that plastic plate moves. It holds the gearbox in place.
5) To remove the gearbox retaining plate (Black plastic, basically fills the whole back of the gun, has a half-circle bump near the bottom with a plastic ledge that points directly out at you) you will grab the ledge with 2 fingers, gently lift and wiggle the plate up and over the body bolt. There should be no "force" required to do it properly- if you are doing it right, the plate will slide out the back of the gun, barely scraping both sides.
6) Once you have the retaining plate out, you will see the back of your gearbox, with the motor at the bottom and wires hanging about everywhere. On each side, there is a small plastic rectangle protruding from the body. These held the plate in place. Pull the wires coming from your motor out so that they will not get caught when the gearbox slides out
7) Above a soft surface, turn the gun stock down, and strike against the palm of your hand. This will knock the gearbox loose into your hand, where you can catch it. The box may get hung up on the lower body bolt, if it does, a flat-blade screwdriver can be used to gently reposition. **NOTE** the motor assy must clear the bottom body bolt before the top of the gearbox can clear the top body bolt.
Gearbox in hand, you can see the trigger mechanism- there will be 2 copper tabs attached to the gearbox, and a copper plate on the trigger mech. itself. The tabs should both be shaped like this: __/_
And the plate should not have excessive signs of burning
9) If the trigger contacts look ok, you probably have a broken trigger mech inside the body itself, and I would recommend taking your pile of parts (neatly bagged in ziplocs and gun case) to Gearbox or APD. Do not take the gearbox apart unless you a)know what you are doing or b) don't mind breaking it beyond repair or c) don't mind paying someone a small fortune to figure out what you've done and fix it.
