If you absolutely must have a real-life death ray, Northrop Grumman is now selling 400-pound 15-kilowatt rack-mountable lasers.
As we've covered previously, laser guns are inferior to projectile weapons for good, old-fashioned destruction. But, if you absolutely must have a death ray, Northrop Grumman is now selling 400-pound 15-kilowatt rack-mountable combat lasers, which you can lash together and slave to a targeting system for some truly evil mayhem. They haven't dislcosed the price on these little beauties publicly, but can you really pay too much for the building blocks of a combat laser tank? I didn't think so.
(Found via io9.)