"This gun is very sturdy and well made, the completely aluminum body makes it very light compared to my other rifle. It feels well built and shoots fairly accurately. The mosfet is nice, especially because it is programmable. The only downsides are minimal buffer tube space because of the mosfet, the grip could be higher quality (the screws started to strip fairly quickly), and the motor was not incredibly strong (not bad though especially with the burst)
Overall I'd give it an 8/10 because it has very solid internals with some minor external flaws
"This isn't a bad gun. Mine came out of the box shooting 330. The included hicap mag isn't all that great, but it works. Battery storage in the crane stock is a bit tight. I wound up damaging the wire insulation on my 7.4 stick; take your time and be careful to not pinch anything. Externally, the gun looks fine; it's finished with a flat black paint. Body is metal, but it's not going to really wow you; the ejection port cover is nicely finished though, and looks far better than some of the low-mid tier guns who leave it in a semi-galvanized grey finish.
The outer barrel thins down under the handguards, so if you wanted to rewire to the front for w/e reason, there is plenty of space. Barrel is 14mm ccw threaded, so you have the full smorgasbord of flash hiders, suppressors, and etc as an option. The inner barrel is pretty nice, but the gun comes with a plastic non-rotary hop unit. Doesn't bother me, but I know some really prefer the roto units.
This gun features a functional bolt catch, and it works well. The gun also features a plug-n-play burst mosfet in the buffer tube. It comes preset for 3 round burst, which is pretty fun; honestly about %80 of why I bought this gun.
One very nice thing about this gun is that it will eat from any magazine I stick in the well. MAG, Elite Force, S&T, Dboy, Modify, Tokyo Marui, & Lancer Tactical midcaps all worked without issue. Gun also fed from some old Star real-cap mags I had laying around. Downside is, the mag catch seems strong, oversized, or both; mags will only lock in if I hold the release down while inserting mag. I'm hoping that fixes itself as the catch gets broken in. For $200, I'd probably recommend a Lancer proline, but if you can catch this guy on sale, AA has some nice features for the money (bolt catch, burst-fet, metal body, quiet mechbox).
Personally, I'd like a better air nozzle and motor, but out of the box, this m4 is okay.