Abstract: A secure storage system may provide secure, portable, and rapidly accessible storage for articles such as firearms. Such a system may have a shell with first and second shell members that can be closed to keep the articles secure, or opened to provide accessibility. A locking mechanism may be used to lock the shell in the closed configuration. The locking mechanism may be controlled by a wireless receiver that receives a signal to unlock the shell. The shell may have a signal-permeable layer that enables the signal to pass through the shell. The first and second shell members may have mounting features that enable articles within the shell to be secured to the shell in a variety of positions and/or orientations. The system may also include a location sensor that detects the location of the shell and notifies the user when the shell is outside an approved zone.