Inspired by the recent psychometric research papers who claimed to use an AI to detect the criminal potential of a person based only on a photo of his face, and taking the world of firearms as a starting point, we present a “physiognomic machine”, a computer vision and pattern recognition system that detects the ability of an individual to handle firearms and predicts his potential danger from a biometric analysis of his face. The device is based on a camera-weapon that captures faces as well as a machine with artificial intelligence and a mechanical system that classifies the profiled persons into two categories, those who present a high risk of being a threat and those who present a lower risk .