Instead of jetpacks for troopers, miniature copters with machine guns integrated were mass-produced which, though being less nimble and more haphazard than the Rocketeer, was better armed and could sustain more damage. When you hear these flying machines in the sky, death is soon to follow.
In Singularity, several Gyrocopters will show up once if the enemy veteran units detect you, they must avoid them as neither of whom can attack air. However, it can be killed by any mind controlled enemy units that has capable of anti-air such as Battle Tortoise, Halftrack, and the Sentinel.
In The Mermaid, a Gyrocopter will come to patrol the prison where Tanya and Siegfried stay minutes later since the mission starts, they must avoid him as neither of whom can attack air.
Versatile unit which can engage both air and ground targets.