Enemy Chopper

A tactic I've been seeing be pulled off by enemy teams lately is one where from a distance, they keep moving to the point that it's impossible to take them down with either the AA gun or rockets, yet they still manage to shoot accurately, making it hard for us to stay on task. What do you guys think is the best way to deal with such tactics aside from sheer persistence?

If he is hovering still at the back of their base then I usually take em out with the tank like on oasis. I often try the at4 too

Personally i say leave em be... There not to effective and its impossible for them to support there team... There basically just trying to rack up free points and cover there K/D cause there to much of bitch to move in and ground play... If you shoot them down with a tank or rockets, cool... But guys like that pose no real threat...