accidental actuation the specifics of the electrical circuitry for firing the device 20 can be easily developed by those skilled in the art and will not be addressed a preferred approach for carrying an electrical charge from a power source through the housing 22 and to the driver assembly 42 will be described this approach includes first and second electrical contact plungers 146 148 schematically shown in fig5 the plungers 146 148 are spring biased 30 through respective openings in the housing 22 to a position adjacent the striker head 44 the first plunger 146 is biased into an open area in the housing 22 between the outer striker head 52 and inner striker head 54 when the impact device 20 is in a non firing condition an electrical wire 150 not shown connected to the copper contact ring 66 passes through a transverse hole not shown in the outer strike head 52 and into the axial opening in the striker head 44 the wire leads to an electrical plunger 152 fig9 disposed on the inner end of the driver assembly 42 and contacting the primer 110 for delivering electric current for firing the primer 110 the ground connection is through the primer 110 skirt which is in close contact with the primer plug 112 a plurality of electrical contact plungers 200 two of which are shown in fig8 nested in the rear end of the inner striker.