Ok, i got the rifle a few weeks ago, and to be honest, there were a few things about it that i did not like. However, we will get to that later. For starters, the exterior of the gun is great, an excellent matte finish. The only thing disappointing is the cheap plastic used for the foregrips. Internally, everything is excellent, except for the absolutely awful piston, made from cheap plastic. In fact, it broke after only a week of having this gun. However i have read many reviews on this issue and they all agree that this is the one weak part of the internal ICS gearbox. So throw in a reinforced one, and you should be good to go. It fires at 350 fps, but will take an M120 with all stock parts (save a piston). The barrel is aluminum, so it will be more prone to warping in extreme heat and cold conditions. Use it as long as you can, then get a brass one. The hop-up is ICS exclusive, so don't bother getting a normal one. The gun is pretty hefty, feels a little heavier than the KWA M4 A1 in my opinion. ROF is great, but semi-auto on this gun cycles weird, i will have to look into that. It is accurate enough to hit a man sized target at 160 feet with no wind, we tested that first. I love the split gearbox design, and with a couple little tweaks, it will be a top of the line rifle. I will give it four stars because i do have to get a metal flashider and a new piston. But the rest is great, well worth the 40 bucks less than a KWA.
-great ROF (using 9.6 1600 nunhuck)
-2 high cap mags (one thermal plastic one)
-hefty fake bolt (idk, i like it)
-semi auto a bit glitchy (maybe its my battery, or fuse, or something that was just an issue with mine, i.e. a lemon. I havn't noticed this problem on other ICS M4s.)
-kinda loud, i have heard that is because of the two part gearbox
-cheap foregrips (no big deal)