A protective case for an electronic device includes an inner liner, a first aperture, a second aperture, and an outer shell. The inner liner receives the electronic device and the first aperture permits access to a touchscreen interface of the electronic device. The second aperture permits optical access to a camera of the installed electronic device. The outer shell includes an attachment mechanism for attaching an accessory. The attachment mechanism includes a receiver channel to slidably receive a rail member of the accessory to removably attach the accessory to the protective case. The receiver channel includes a lip for retaining the rail member in the receiver channel. The attachment mechanism further includes a snap feature having an interference fit with a corresponding snap feature of the rail member to removably lock the rail member into the receiver channel when the rail member is inserted into the receiver channel.
