Originally posted by Rogue Jedi
It's not a laser gun, it's an energy weapon.
They're called 'gravity-guns', I used to think they were sound-based weapons. Either way, they seem to kill by hitting the target with concussive energy, ie slamming into them with 'X' amount of force. Which seems to be strong enough to send a man back a bit and killing him in the process.
Not sure that will do much to Robo-Cain.