An alarm ready portable case is provided in which to secure a firearm or other protectable. The case includes sensors, a lock and, in several embodiments, structure to support the article to be protected. The case is adaptable to become part of a pre-existing facility security system of any of a plurality of manufacturers by being configured to receive any of several connectivity elements that are compatible with at least one of the security systems. For example, wireless transmitters that are compatible with different alarm systems may be connected. Terminals may also be directly wired into a hardwired zone of a security alarm panel. Transmitter receiving structure may be provided in the case for holding any such transmitter. Terminals are provided to connect to external wiring. Slots may be provided for communication interface cards, such as ethernet cards, wireless telecommunications cards, or other connectivity hardware. Internal conductors are provided in the case to connect the sensors to the transmitter, external wiring or other connectivity devices. The sensors may be normally closed switches that are opened when the lid or the lock of the case are opened, motion detectors that actuate when the case is moved, or other detection devices that generate a signal when the case is otherwise tampered with. The case provides an efficient way of retrofitting an existing facility alarm or security system to specifically protect a firearm or other protectable item.