The pic of the Loach with a mini gun mounted was interesting. I've done some reading on the Loach pilots and from what I've heard, they truly were Cowboys.
Their job was to swoop around in those little helicopters and locate the enemy,...then bring in the bigger stuff. Initially, they weren't intended to carry arms. But that got over with pretty quick. A lot of them had Browning 30s mounted on them. But if you really wanted to be serious you'd stick a mini gun on it.
Seems to me that that main problem with a mini gun on a Loach would be where to put the ammunition. Those things like to eat. Also, it seems to me that you would have to learn to fly against the recoil in a little helicopter like that.
