G&G wires the gun wrong (well in my case), so I had to send it back in. Got it back today and it's shooting like it should... Except for the FPS. It's advertised to shoot about 340-370 fps depending on the sites and reviews. I chronoed today and mine was shooting anywhere from 240 - 280 fps (Which is way too low). I'm going to try to send mine back in to get it looked at or exchange it. It's most likely a piston leak. It seems like it would be a great gun if I could get a functioning version.
pretty easy to put a small type battery in the hand grip
decent rate of fire (7-8 rps)
Very nice stock for the money
this is pertaining to MY m4. I've seen other G&G Combat Machines and they don't shoot the way mine is right now:
Low fps (240-280 fps)
because of the fps, low range
Mainly for CQB
barrel lacks a threading core, so this involves taking the orange flash hider completely off to get into threading. (which can be a pain).
Rating: [3 of 5 Stars!]