Is it, just read my post. You have to come straight down on it, aiming your nose straight down at the open turret. I don't like to do it much in the Lightning as I'd rather use my ammo on another plane rather than waste it on a GV.
ack-ack
Did this lastnite at A73. Came straight down on a wirble not paying attention. Fired a burst from my fm2 and poof,Wirble disappeared. I'm guessing I killed the driver? Rarely do I get that shot before receiving a face full. Also abit harder when their smoking and running around like, headless chickens. The wirble looked perfectly intact, just unaware hehe.
Also Ack- Ack would have to come down to the deck to kill a gv.