I've observed a Central American WWII-era built M8 armored car [6-wheeler, Mogas engine] fitted with the power turret and quad .50s of an M55 mount, more usually found fitted in the back of an M16A1 halftrack or duece-and-a-half truck. At the time they were also reworking their M20 versions [and old WWII M3A1 and M5A1 light tanks] fitted with a single-shot 37mm AT gun, for replacements with 20mm autocannons. I imagine the possibility of a 25mm Chain Gun is do-able, but their Escuadron de Caballeria seemed to think that the 20mm guns were quite an improvement.
Maybe it's just me, but this old grunt likes to be able to throw a lot of lead downrange. Maybe one with a couple of coax mounted 7.62 mini-guns.....
L
Dillon Aero boss Mike Dillon, whose company rebuilds and reworks M134 miniguns for the U.S. military and other customers, had [and may still have!] an old quad .50 mount with a single M134 replacing all those .50s. For any thin-skinned targets less than an armored vehicle, that allows the minigun to carry ammunition WAY in excess of that most mounts could handle [usually just the 3000-round aircraft ammo can] But I'm sure Mike could set his up with twin guns very easily if he was so inclined.
Of course, there's always Jon Ciener's triple minigun setup...
