G&G ARP 556 Full Metal M4 Airsoft PDW AEG (Package: Black / Gun Only)

"This thing is a CQB beast! The full metal body is heavy for a gun it's size but it feels so realistic. The angles and ergonomics on the body look super sharp. I put on a tracer and a red dot and it looks awesome.
As far as the internals: The ETU/MOSFET is pretty basic except that you can program it for 3-round burst. The trigger response isn't the greatest though, it has a lot of travel. Otherwise it just has the basic G&G internals (18:1s, 25k motor, stock compression, rotary hopup). The barrel is a 6.08mm, to wide in my opinion.
My only major con is that there's like no space in the stock for the battery. Sometimes I'm able to stuff the battery in there and get the cover on, but most of the time I just leave it sticking out the back.

Pros:
Full metal body
Solid (inside & out)
Cool externals
ETU
Ambi mag release/fire selector

Cons:
Battery space
Trigger response
Inner barrel diameter