I have owned this AEG for three years now, and I have never had any reliability issues with it whatsoever. All metal parts are of a very high quality standard, they are all very solid, very durable, and very nicely made. The AEG chrono'd at around 350FPS, but there was another spring included that runs at just under 400FPS with .20g BB's. Besides replacing the spring, I have not replaced anything else internally. Still, the AEG runs smoothly and reliably with a 11.1v LiPo battery. The pistol grip that houses the motor is very slim, much like that of a real AR. The external finish of the gun is a matte black that is very nice and abrasion/scratch resistant. The flip-up sights solidly lock into place, and the fire-selector switch also locks into place well with an audible clicking sound. Unfortunately, the fire-selector on the right side does wobble somewhat, though I have never found this to be too much of an annoyance. The faux bolt locks back and releases with both bolt-catches, and both of the magazine releases work well. Though this AEG does have quite a price tag, it feels as if it was well worth the money I spent on it. Thankfully, I was able to get about 116 dollars off when I bought it during a Black Friday Sale at Airsoft GI.
-It is able to run with a 11.1v LiPo battery for an extended period of time.
-Extremely nice external parts, both the metal and the plastic parts.
-Innovative and very usable rail system(thanks to Knights Armament for the overall design of the complete weapon system).
-The orange tip comes on the AEG but it also comes with a KAC style Triple Tap Break(-14mm).
-Two springs are included for the gearbox.
-Great warranty from Airsoft GI, and also from VFC.
-Extremely smooth cycling of the gears and the piston.
-Good air-seal and Hop-Up unit.
-The orange tip was difficult to remove since it was glued onto the barrel, but a blowdryer helps a lot.
-Wobble of the fire-selector switch on the right side of the AEG.
-The dust covers locking piece fell off, but it does not bother me much at all.