Abstract: A system including a gun lock for mounting to a trigger guard of a gun is described. The gun lock includes separate first and second portions, a lock configured to lock the first portion and the second portion together, and a lock controller. The lock controller includes a wireless transceiver configured to transmit a signal in response to sensing movement of the gun lock and transmit a status signal in response to receiving a status request. The system includes an alarm controller configured to monitor a plurality of premises devices, in which one of the premises devices is the gun lock. The alarm controller is configured to periodically transmit a status request to each of the premises devices and listen for a status signal from the premises devices after each transmittal of the status request.