according to the present invention , a firing probe assembly adapted to deliver an electric firing signal from a firing apparatus to a non - impact fired ammunition cartridge in a firearm comprises a probe shaft , a probe spring , a probe tip , and an actuator bushing . the probe shaft is secured to a frame of the firearm and in communication with the firing apparatus . the probe spring is mounted between the probe shaft and probe tip , thereby urging the probe tip forwardly against the actuator bushing . the actuator bushing is biased rearwardly by an actuator bushing spring and is positioned and configured to be displaced forwardly by momentum of a firing mechanism of the firearm . the actuator bushing is further configured and positioned to bring the probe tip into contact with the cartridge when the firing mechanism drives the actuator bushing in the forward direction .