The mounted 50 is currently extremely underwhelming and somewhat pointless, it fires too slow and inaccurately to deal with infantry and deals little damage against soft targets.
Give it a new purpose, make it shred light armor.
The littlebird should fear the .50 cal, the Blackhawk shouldn't be able to linger under fire from one without extremely bad consequences.
Let it chew up Humvees as a kind of defensive bullwark against speedy bois