The title is indeed a trifle misleading, as the the chopper shown was a Huey, and the gun was the Mini-Gun. Impressive footage anyway.
Dont know that the minigun was fitted to the Hughes 500D shown in the clip, always thought they had a forward firing cannon.
The Apache was fitted with a large Chaingun, somewhat heavier and different operation to the minigun.
Always thought the Mini would be good for roo shooting on the back acreage.