When I received my ATP Auto it was packed pretty much the same as the regular ATP. Off the bat I noticed that when you shake the gun you can hear a rattle from the outer barrel moving, but on the regular ATP (at least mine) the outer barrel does not rattle. This is not a problem though it does not affect the performance. I took my ATP Auto to Miami airsoft this past weekend and it was able to totally replace my primary, which it did. I didn't give this gun five stars, which I will explain in the cons.
Higher FPS than a WE or Tokyo Marui
Metal construction including slide (except for high strength polymer lower half)
Slide locks back with one round in magazine (this is only the mag that came with it; my other ATP mag worked great)
First few games it shot a burst of full auto on semi, but after that it stopped.
Rating: [4 of 5 Stars!]