One aspect includes a smart-gun configured to communicate with user device via a communication network. The smart-gun can be configured from an unlocked configuration where the smart-gun is operable to fire, to a locked configuration where the smart-gun is inoperable to fire, the configuring to the locked configuration in response to a locking signal; and configured from the locked configuration where the smart-gun is inoperable to fire, to the unlocked configuration where the smart-gun is operable to fire, the configuring to the unlocked configuration in response to an unlocking signal.