here we go, someone smacks the typhoon.......  OK, thanks for following in line with the original question and contributing to the answering of a question.  Appreciate you using your platinum status to help fellow players answer a question.  I prostrate myself before you almightiness.  Dweeb.  
Aim could be an issue, although a stream of 50-100 20mms IVO a tank should hit something, especially when you see the ricochets.  So, reality is I need to work on my aim.  I am sure no one else in the game has noticed, albeit platinum level dweebs, the difficultly in shooting out the pintle gun on a tank. Especially relative to the volume of bullets and that humans manning the things were not armored, except for their won't stop a 7.62mm and higher helmet.    
And shuffler go find some kid in MA to haze.  If you have a valid comment which contributes to the post, post it.  Otherwise can it.