I got this gun with the Christmas package, so I've been using it for about 2 1/2 months now.
First, lets talk about the externals. The site says that it's fiberglass reinforced plastic, weather or not that's true I don't know. Regardless, it is VERY strongly built with absolutely no flexes, creaks, or wobbles. However, when the stock is folded in there is a bit of vertical flex to it. Nothing major, just a note. Metal parts include the three front rails and sling attachment. Strangely, the top rail is plastic, however it is very well built. The sights are good, also metal.
Next we'll move on to the internals. I'm not very experienced with this but I can give a warning. About a week ago, so about 2 1/4 to 2 1/2 into the gun's use, both the air nozzle and cylinder head assembly broke. Granted this is only a $24 dollar fix but still, just over 2 months? Not good. On the other hand, the rest of what I saw of the gearbox was good; metal everything but the spring guide, tappet plate, and a few other minor parts I believe. Standard barrel, fairly accurate (I'll discuss more later). As a note, one of the screws in the gearbox was held in by lock-tight and required me to drill it out.
Lastly, how does it field-test? I can say that I'm very satisfied with it. It shoots around 335 stock (at least mine did) which is respectable. The range is good, well over 100 ft. I can't give exact readings as I haven't measured. It's surprisingly accurate too for a gun with such a short barrel. Again I can't give exact measurements, but it's good to go. The mags are OK...they are wobbly but they feed fine. Also, the ability to stack them saves tons of time when reloading. A note about the mag release, it's modified so you can release the mag by pressing a lever right beneath the trigger guard. While I'm sure this is great in CQB or when you actually plan on leaving a mag behind, it's left me a few times dropping a mag without realizing it.
Regardless of the few issues this gun has, I'd strongly recommend it to any player, especially for the price.
*Very strong body
*good power and accuracy
*Mostly good internals
* Ambidextrous selector and mag release
*M4 flash hider (cosmetic)
*air nozzle and cylinder head assembly broke in under 3 months of use (about a $24 dollar fix)
Rating: [4 of 5 Stars!]