Started life as a JG M4, but has since been upgraded with the following:
Full metal body
SHS full steel tooth piston
KWA inner barrel
ASG metal hopup chamber
KAC Licensed muzzle attachment
Rewired to Deans
400 FPS (woodland legal).
The mock bolt is slightly fickle but this doesn't hinder functionality at all. All upgrades were done by professional hands.
Will come with one metal high-cap. I have more of these as well as a 7.4v Titan battery if you're willing to pay for them.