CYMA metal body and gearbox. Not to sure what's wrong with the internals right now. I think it might just be an AR Lever problem. It shoots full auto but it isn't to happy to shoot in semi. It also has trouble feeding sometimes. It's an easy fix though I think. -Metal Reciever (Colt Trades) -Madball DD 9.5" Rail -Crane Stock -Ergo Pistol Grip -Foregrip -Includes x1 Midcap and x1 Highcap •Looking for Aks, G36, or something else "exotic"•