From what I've been told, this is a great gun. AGI got it to me in one piece and very well packed. Was able to fire about 20-30 shots in semi auto before a nasty grinding noise and no bb's were coming out. Upon stripping the gun down and taking the mechbox apart I found that the sector gear on the lower half (most teeth) had 2/3 missing teeth. Upon further inspection in the mechbox I found the teeth, they had cut CLEAN off the sector gear itself. Not stripped or milled down but cut clean off.
Now whether I just happened to get a lemon remains to be seen. Cannot do warranty due to stripping the gun down and would not do it anyway due to the fact that it's just this one gear. More than likely the gear itself was defective or G&G failed to shim properly (some mention that you should pop the box, reshim as necessary as well as grease it up).
All in all I am sure this is a great gun once I fix the broken parts, although it looks like G*G might not have worked out all the bugs in their quality assurance dept. For the new people I'd suggest sending it back to AGI for Warranty or paying a dealer to work on it if it breaks as the Mechbox is a fairly tricky beast to deal with, (Keep track of those small parts!)
Great looking gun
Feels almost as heavy as my real AK47 without the 40rnd magazine in it
Good balance with a battery in it
Stock is fairly large, will fit a 9.6v 4200MaH battery from ShortyUSA but tightly (crimps wires)
Sector gear teeth were cut clean off, looks to be a defect in the gear
For RMA/Warranty, requires to send ENTIRE gun back.
Piston teeth also look chewed up which disappoints me as G&G is supposed to have great internals
Removing the compensator seems to be impossible without tapping out the pins that holds the whole Front sight block on.
Rating: [5 of 5 Stars!]