Wassup? During my time last weekend tearing it up at SC Viper, I did some serious work with the A&K M60VN machine gun.  But it wasn't all fun & games.  I had trouble throughout the day with my battery pack, which is stored inside the box mag, because it kept toggling the switch on the side of the box mag either into the "Off" position or the "Continuous" feed position, which caused the magazine to continually try and feed BBs into the gun, even though the gun wasn't firing.  
A&K M60VN Machine Gun Box Magazine
Tom Harris for the Pyramyd Airsoft Blog