Tank shooting/moving

ok! So I have a rotating barrel (or what it’s called), and the basic for the shooting. But I can’t get the tank to move, because then the barrel wont rotate/shoot. The barrel and the body of the tank are seperate MC’s.
My question: How do I make the tank move at the same time as you can move the barrel?

Then I have a few more questions, but this is the most urgent.

Hope you understand what I am trying to say :smiley: