Thoughts:
1) The inertia on this thing is going to be enormous. It'll take a powered assist to aim this thing while powered up, if it works like the article says. Spinning metal balls around in a circle at 3,000 - 8,000 fps? Think about moving a bicycle tire quickly and precisely around while it's spinning. It's more difficult than when it's not spinning. Now think about aiming this weapon quickly and precisely when it's spinning around 200 rounds per second at 8,000 fps inside of it.
2) I'm curious to see how they solved the vibration/recoil. Basically, it sounds like they've constructed a centrifuge and mounted it inside a weapon. Ever seen a laboratory centrifuge? The researchers have to balance it right, or it'll vibrate itself right off the lab bench. Maybe it fires two rounds at once, each spinning in the opposite direction.
3) Frictionless and heatless my butt.
Rubbing one metal surface across another at 8,000 fps? Next they'll be claiming it'll run off of 9V rechargeables.
4) They advertise the weapon as light - do they realize how heavy 50,000 steel/tungsten penetrators are?
5) Jamless? Give it to a soldier for an hour in the field. He'll figure out a way to jam it, I promise.
6) I'd hate to be within 500 feet or so of this weapon when it's powered up and firing, and an RPG hits the weapon and blows it apart.
