The patch notes said: Other Miscellaneous Changes The UI now shows indicators when vehicle passengers are hitting enemies Which I interpret as some kind of sign to the driver that your gunner are hitting stuff, which would be a very nice feature. Either I am blind or they didn't implement it :S
it's the vehicle symbol on the right side of your screen the number of the gunner will blink with a red circle when he/she hits something
Ah so that is what that is Is it only for direct hits? because it doesn't feel like it occurs all that often :S