Russian troops testing a new anti-drone ‘mobile fire unit’ almost killed one of their own soldiers when a repurposed helicopter machine gun spun out of control and sprayed bullets across a training ground.
A Yak-B 12.7 HMG on more or less a reinforced version of a diner seat base. As an anti-drone weapon, no less.
See the problem with this gun is the recoil vectors off to the side of the point of rotation where it is mounted. It produces torque whenever it is fired.