I can't find anything on how accurate it was or if it could be fired twice even. All we really know s that it "fired" the one round. I'm taking his word that the cartridge even had a bullet in it.

It's certainly a long way off from a fully functional firearm as we know it. Not like the ones they show in the lead up to the short demonstration.

If we don't count our blessings
We are just wasting our time