A retrofit able Trigger Guard assembly is the invented embodiment, which is attached permanently to an existing firearm or can be integrated to any firearm during manufacturing. This assembly is attached permanently under the muzzle of any firearm, typically a hand gun. In general, the invented mechanism operates under the force of gravity and certain relevant lever action extends guard plates on both side of the trigger assembly, thereby making it in operable. The guard plates are extended over the trigger guard of the firearm as soon as the gun is pointed downward. This mechanism is locked inside the assembly by an electrical miniature solenoid, which release the lock in order to facilitate the retraction only if the firearm is leveled and the bio metrics of the user matches the pre stored finger prints in the memory of the assembly, therefore, only authorized user can activate the trigger.