Lucas123 writes Safe Gun Technology (SGTi) is hoping it can begin production on its version of a smart gun within the next two months. The Columbus, Ga.-based company uses relatively simple fingerprint recognition through a flat, infrared reader positioned on the weapon's grip. The biometrics reader enables three other physical mechanisms that control the trigger, the firing pin and the gun hammer. The controller chip can save from 15,000 to 20,000 fingerprints. If a large military unit wanted to program thousands of finger prints into a single weapon, it would be possible. A single gun owner could also temporarily program a friend or family member's print into the gun to go target shooting and then remove it upon returning home."