The full gun is the Sig Sauer Licensed SIG 552 Commando Airsoft AEG Rifle w/ metal gearbox. The gun was given to me as a boneyard project but I haven't had the time to buy new parts for it so I did what I could. The gun is fully working and fires very well. The only problems are that the fire selector is a little rigid because there was no small selector ball with it. The selector switch still works (safe,semi,auto) but it is a little rigid like I said. The other thing is the hop up was broken so a new unit is needed. After that those are the only problems I know of. I took a look inside the gearbox and fixed the connection problems which is allowing it to fire as well as replacing the fuse and installing a fuse cover box and wiring it to the front. Buyer pays shipping.