Vehicle awareness - How much ammo have you wasted?

[Canaris]

I was playing planetside there with my brother using various vehicles, something cropped up that I thought could get fixed in the new one, unless you already thought of it.

"Fire ze cannonz!"

"We can't bro"

"VHY NOT!"

"I'm out of rounds, and stop talking like that"

The problem being not knowing how much ammo the gunners has used as the pilot, since it's your job to repair and rearm the vehicle it would be nice to know that you need to go do it.

Having a read out on the vehicle/aircrafts HUD would be helpful displaying not only your ammo count but also for any other weapons systems.
You also might make a clear visible distinction between yours and theres so as not to confuse matters.