Abstract: A device and method for firing a cap contained within a row of caps. The device includes a base structure for retaining the row of caps so that one of the caps is set in a predetermined firing location. A hammer pin is provided that is movable with respect to the base structure and the cap held therein. The hammer pin is positioned adjacent to the cap in the predetermined firing position so that when the entire device is compressed the hammer pin strikes and fires the cap. The device is preferably compressed by locating the device either in or on the sole of a shoe. As a person stands on that shoe, the device will become compressed and the cap will fire. The device also preferably contains an advancement mechanism for automatically advancing a new cap into the firing position after a cap has been fired. In this manner, multiple caps can be fired simply by walking, running or jumping.