just got an ak (from a d00d that didn't respond to me for 2 weeks untill i sent a fraud report to paypal, then he sent me a gun that was covered & filled with sand. took me 2 days to clean it out, in addition, the gun lacked the internal systema parts he promised: systema flat gears and bearings)
Don't know that much about ver.3 but I had that prob. with my M4, I just tightened up the little hex screw and the sound went away.
That happened to me too. I tightened up the screw under the motor and the sound decreased.. and then i relubed the mechbox since i was upgrading it and then the sound went away even more. So maybe lubing it will reduce it more?
