Barrett gun scaling

"Company," snapped Barrett, raising his arm. A group of four more thugs
sprinted into view from along one of the radial corridors, each of them
armed with a heavy rifle.

"Take them," said Namir.

Barrett's right arm came apart on expanding frames, the plating folding back,
the hand turning aside to allow the mechanism within to emerge;
he tugged an ammunition belt from a hopper in his backpack, swiftly slotting
it into the feed maw on the base of the reconfigured limb. From
the wrist emerged the triple-head barrel of a minigun. The muzzles spun into
a blur, and with a sound like the buzz of a heavy electric
generator, the cyberweapon ejected a gout of yellow fire and a storm of
bullets. Grinning, Barrett panned the cannon across the corridor,
ripping through the flimsy flakboard the guards used for cover, tearing into
them, blowing craters in the surface of the unfinished concrete.

- Deus Ex: Icarus Effect, Chapter 4 pg. 113