Hmmm, I'm not sure what to tell you mate. When I touch the map -- it works fine for me and fires. Definitely ask Z about that since there might be others with this same issue.
I've been practicing what I call the Mexican jumping bean spray for those guys! I'm learning their range and practicing putting a bullet in every square inch of that area.
i wanna get a soldier/tank ON TOP of a landed plane, and then fly around as a turret! that'd be awesome! imagine how fast you could reach the enemy base, and how easy it'd be to win like that!! DOGFIGHT BUCKET LIST!!!