Just bought this gun and had a field run with it. To start off with I was looking for a field gun, but I wanted the look of a stubby with a suppressor. Thus, I bought this, stuck a Venom Dark Earth mock suppressor on it with a tighbore barrel upgrade. It seriously looks nice. With the tightbore shoots a consistent 365 fps with .20. The gun is definately solid with some heft and fits nice to the shoulder. All the rails are integral. Because of the Dark Earth paint job though, assessories are a bit tight to slide on. I am happy overall, but there are some serious annoying flaws (see cons).
The XCR or "AK" style allows a shooter with a full face mask to better utilize optics. Didn't have to use a riser.
PEQ box is extremely cheap plastic and cracks at the slightest pressure. The wires to the PEQ box are absolutely awful. The connector is too big to shove back into the upper receiver, thus you have about six inches of wires and the ugly connectors showing.
Although metal, the upper and lower receivers are off just a bit.
A little stock wobble, but no biggy.
Magazine-well way too tight. You have to depress the mag release to actually slide a mag in.