The GAU-8/A Avenger Gatling gun on the A-10 Thunderbolt II.
This gun is one of the reasons I love flying the A-10 Thunderbolt II in Tom Clancy's HAWX. Great photo.
I would hate to know I was at the receiving end of that gun that is probably the most powerful gun put into a plane
aye it sure is one of the most feared weapons in US aircraft.