Abstract: A safety device for firearms includes a scanner for scanning in a user's finger or thumb print, and a microprocessor for storing the data associated with the fingerprint. The microprocessor can also be programmed to store the name, address, phone number, and social security number of the user. The device also includes at least two indicator lamps to inform the user whether the system is armed or unarmed, and to provide an indication when the battery is low. A solenoid activated spring loaded mechanism defeats operation of the firing pin thus rendering the firearm inoperable. The mechanism is designed to make the firearm appear to malfunction.