The blinding leap in technology of the last 20 years has brought the world amazing gadgets for communications, medicine, leisure, personal computing, and a whole slew of other areas of human interest. No one seems to mention that it’s also brought terrifying advances in mass killing, a.k.a. war. Yes, the art of killing in great numbers has experienced a quantum leap in the past few years too, and the effects might be horrific. Progress has a price, and it’ll probably be somebody’s head. Here are some sci-fi weapons that actually exist today.