A tool. A firearm, a blade and an ancillary device are disposed within or on the tool. The firearm comprises a barrel through which a bullet passes to exit the firearm, a firing pin moveable to a firing position by operation of a firing pin control, a firing pin lock retaining the firing pin in the firing position when in the locked position, a biasing member for applying a force to the firing pin with the firing pin restrained against the force by the locked position of the firing pin lock. A trigger releases the firing pin lock from the locked position, such that the force causes the firing pin to strike the charge proximate the bullet. The bullet then exits the barrel.