When i hear the missile lock on sound i just use the right D-pad to select the anti missile weapon thing. I always have two of them on me at a time because they are like 2 extra lives when flying a warhawk. I rarely die from a missile doing this.
When locking on with swarm missiles or homing missiles you can fire the machine gun at the same time. This can be the difference between taking them out and not.
Always have 6 grenades if possible when on the ground. They are the most lethal weapons.
__________________
|