||When I first got the box out of the gun the barrel started rotating freely, but a little tightening of a screw inside the hand guard fixed it. I used a 9.6v battery with it, and the ROF is amazing. However, of the three high cap mags I have, they all had difficulty feeding properly especially on full-auto so I recommend picking up a few mid-caps. The tight bore barrel shoots with great accuracy out of the box, but I upgraded to a longer 450mm barrel that was only 6.03mm in diameter (add a mock silencer for the longer barrel.) The gun separates much like metal M4's with you having to take out the front and back pins, unlike what the manual states.
Feeding issues (not what you want in the middle of a firefight)
Came out of the box with a couple things out of place (barrel rotated, delta ring coil not in housing)
Fought to get the gun apart (longer wires would have helped)
Overall it's a great gun especially for starters, and will allow you to be competitive with most other guns. I highly recommend it.
Rating: [5 of 5 Stars!]