Use smart technology such as biometrics etc., to create a one gun, one or more user usable weapon.
This technology has been used to protect peace officers from having their own gun used against them etc.
This proposal would add more than one person in family the ability to use weapon for defense, or could be made a one person one gun system.
It would allow any gun type to possess an interactive system, which could include safety lever and clip release lever, not just the ability of pulling the trigger.