I'm just finishing up on one I pulled from the box and everything lines up just fine. I'm going to post the results as soon as I'm done, but the gbb will not be ordered for any reason whatsoever due to the extreme modifications and other issues that make it not worth the trouble importing them so anyone that was interested or are looking to do it in the future needs to go with a different receiver kit. I can't stress this enough. Sorry guys. Almost done with the G&G Combat Machine's gearbox, motor, inner barrel. Thanks guys. Be back soon.