The brake bolt and the lock cylinder of the vehicle lock are mounted in a part of the vehicle for preventing the rotation of a wheel of the vehicle in a locked state. In one aspect, the lower receiver having a first end and a second end contains a firing control chamber. The circuit is also configured to output a portion of the input perception signal when the circuit is receiving power output a zero amplitude signal when the circuit is not receiving power. The pivot assembly further has a second magnetically permeable member.