The photo of the plasma ball it fired gave me the impression it was a plasma gun.
It's firing through a lens, a solid lens. That means that what it's firing is energy (which can propagate through a lens), not plasma (which would either be stopped by the physical lens or break it).
Believe me, it will be quite some time before anyone is ready to prototype a 1 MW plasma gun which is anywhere near man-portable. I work with one-megawatt plasma etchers; they're about one displacement ton in size, not counting ancillary equipment. They're also not weapon speed on anything with even minor energy resistance; to etch thirteen-hundred-odd nanometers into silicon takes them about a minute and a half to two minutes; I'd hate to think how long it would take them to penetrate armor-grade ceramic composites.
As I said, laser pistol, not a plasma gun.