Any idea on the problem?
I have had a Star M60 for 8 or 9 years, not sure how similar the box mags are to A&K but I had no end of problems within days of buying it, namely the box mag motor burnt out as the cut off switch didn't do its job. I then had to wait 2 months for it to be sorted under warranty. It did exactly the same 2 weeks later. Luckily it uses a cheapo 3 or 6v motor and I picked up a few similar ones (slightly longer) from Squires Model tools for 50p each, and eventually wired the motor via a 3 way switch and spare mini tamiya connector into the trigger contacts so it winds only when the trigger is pulled, the other switch settings being off and mag battery auto feed (last only used when the mag has just been fitted to wind bb's into the gun, then switch to trigger contact operation). Works a treat now, and not had any trouble with overheating despite the higher voltage to the mag motor.