Are laser guns possible today?

Question

By this, I mean portable laboratory grade lasers that could cut through at least plastic (heck, even Wicked Lasers can do that). I mean powerful lasers that can at least cause severe (3nd degree & up) burns in about half a second. It must have a sustainable power source (continuous for at least 5 hours). It could be a continuous beam or a rather silly "blaster beam." Is it possible today?

Answer 1

Not yet.