the problem bota, is that to kill the osty's gun you must either come in from extreme hi angle right above it (making YOU a very easy target for the osty) and shoot a toejamload of 50 cal to ensure a hit.
Another problem is it receiving a 1k bomb 5 ft from it... and it goes on. Ay ay ay ay
Also, I have noticed that in ANY gv, if you getting strafed , going to drivers position doesnt "hit you" .. aka, the gv gets no damage to its open positions. Very few times the guns get knocked out though. Especially in LVT's, which are waaay open hatches.. plane comes in, if you in gun, a ping or 2 and all your guns dead. But jump into drivers position, you have a damn good chance at not losing a gun. Its something i've noticed, dunno why it happens.