Overall, I really like this gun. It's one I bought that I was going to leave largely stock. Most of my guns are heavily modified, I needed one that I could take out to the regulated field and use legally. Plus, the ability to change springs quickly makes it really flexible. I was shooting about 380 FPS out of the box which was pretty impressive. Something else about this gun that I noticed was that the BBs really carried for a long distance, travelling perfectly level once the hop up was adjusted. I know this is how it's supposed to work, but this gun does it better than any other I own. I'm shooting Elite Force 0.28 and KWA Perfect 0.30.
Ok, so there's a negative: After maybe 1000 rounds, the gearbox stripped. I thought it was a piston/sector gear strip, but it was actually the motor pinion. The set screw that adjusts the pinion/bevel gear engagement had backed out which will definitely cause this. So, the gun came apart (no small feat, but not the worst I've seen). While I was in there, I replaced the piston and head with a Deep Fire Titanium and Modify Poly, Siliconed the cylinder head, and replaced the motor with a Lonex A2. I also updated the bucking to Mad Bull Blue. One thing I noticed: The nozzle leaks pretty badly. This is subjective, but I can push the piston all the way through in about 4 seconds. A small amount of silicone grease helped, but I really need one with O rings.
I run 11.1V LiPo now and it's almost too much. Fires about 24 RPS with an MS120 and the A2. Spring upgrade got me about 360FPS with 0.28's which should be about 425FPS with 0.20's.
If you happen to buy this gun and get into it, Teflon tape the barrel with about 2 layers, maybe three. It's loose in the outer. Accuracy improved after I added this, but it shot very well to begin with.
Overall, I like this gun. I think it can be easily maintained and seems to perform well. Please though, take that butt plate off and check the motor engagement. You could easily remove the spring, switch to FA, then hold the trigger while tightening until you hear a slight grinding. Back it off a little. Done. Threadlock. Seriously.
Good FPS out of the box
Accurate, I was pretty impressed.
Gearbox, while TOTALLY proprietary, is easy to work with/comes apart cleanly with no parts flying everywhere
Well balanaced - weight near the back makes the gun easy to hold raised for long periods
Despite the leaky nozzle, FPS is pretty consistent (0.28's are 356-362FPS out of 12 rounds)
Loose pinion/bevel engagement screw after a few hours led to minor overhaul. THREADLOCK :)
Mags are a little tough to install unless aligned well. Not as easy to swap as, say, your average M4
Louder than any AEG you own. Even with the bolt cover open, it's not quiet, but the blowback is loud.
CW flash hider? Really? Magpul Blackout looks good on it, but I'd like to fit my G&G tracer unit without a reverser. Ugh.
Plastic nozzle w/o O Rings leaks, not much you can do about this.
Stock motor, while adequate, is slow on FA. I was expecting 13-17RPS, got about 10. I can semi that fast.