7.62 mm M134 General Electric 'Minigun'
"Fires up to 6000 rounds per minute. 7.62 x 51 mm shells. 1.36 kg recoil adapters. Six muzzle velocity of 869 m/s."
- Elvis in They came and ate us by Robert Rankin
The problem is that you need three heavy-duty 12V truck batteries to power the gun, or alternately a 28V 115 amp power cable. Would make even a macho man like Blaine clumsy... This is why it is mostly used in helicopters. This mean piece of equipment has been in some serious use in the books by Robert Rankin. The gun in Predator was actually a .223 calibre version.