Cerberus Gun Specs / Gyroscopic System

The Hercules shook as the landing gear hit the tarmac. Inertia yanked us all in two or three directions. The suit’s gyroscopic systems kicked in, made me a statue. I took a deep breath and rolled my shoulders. Cerberus did the same on a much larger scale and half a dozen armor plates shifted across the suit’s back and shoulders.
The ramp dropped with a whine of motors and a hiss of pistons. It wasn’t halfway down before we could see the dead things staggering across the runway toward our plane. I raised my arm and three hundred and ninety-five thousand dollars’ worth of targeting software kicked in. Crosshairs blossomed in my sight, ballistic information scrolled by in my peripheral vision, and the cannons thundered. Four exes exploded into dark puddles before the ramp hit the tarmac.
By technical definition, the Browning M2 was a massive, one-hundred-forty-pound semi-automatic rifle, but it was hard to think of it as anything except a cannon. Normally they were mounted on Humvees, helicopters, or aircraft carriers. The Cerberus suit had one of them mounted on each arm, their barrels reaching a good foot past its three-fingered fists. Twin ammo belts swung back to the file cabinet–sized hopper mounted on the armor’s back. They could fire nonstop for three and a half minutes, with an effective range just shy of two miles.

Excerpt From Ex-Heroes, pg 264-275
Peter Clines
https://books.apple.com/us/book/ex-heroes/id585738407