This invention includes an adaptive mechanism for activating a firearm's trigger comprising a bite-activated trigger assembly, a cable assembly, an actuator assembly, lanyard, and a storage assembly. When properly assembled, the actuator is mated adjacent to the firearm's trigger in such a manner that the actuator is not exerting a force significant enough to activate the firearm's trigger. One end of the cable assembly is attached to a bite trigger assembly. The bite trigger assembly includes two bite plates that are pivotally joined together near the centerline of the bite plates. The bite trigger assembly also includes a feature to mount with the lanyard assembly. Finally the bite-activated trigger assembly includes a storage assembly that is used to stow the bite trigger assembly when the firearm is not in use.