Robot + Super Gun = âCrowd Controlâ What do you do with a robot armed with a million-round-per-minute gun? âCrowd control,â naturally. For several months, Metal Storm, the troubled electronic gun developer, has been working with iRobot â" the makers of military machines and cute, semi-autonomous vacuum cleaners â" to arm some of their new, 250-pound unmanned ground vehicles. Last week, at a defense trade show, the two firms showed off the results of their joint venture. I posted before about Me