Could this be how a good old blaster could work?

Just a thought, but if you had a device that could create a small bubble (~5mm across) and have that move down a tube/barrel of a few cm faster than light, and then collapse the bubble at the end.

Would the result be that all the gas (atmosphere) that was in the barrel at the start becomes a very high powered blast of gamma rays & incredibly fast partclesshooting out the end, along with next to zero recoil.

And there you have it: a Star Wars style blaster or maybe a B5 PPG.