Designed as a quick resolve pocket scatter weapon, it utilized varying sized galvanized steel and a spring loaded bolt as a triggering device. This weapon was demonstrated and does work with little discomfort from heat and force though I would not expect to use this particular model for more than one firing. It requires 12 gauge rounds with a suggestion of bird shot. 3 or 3.5 inch rounds can be used and are loaded by unscrewing the gripped frame from the trigger slide frame. All parts purchased from a local hardware store cost no more than 10 dollars and is approximately 8 inches closed and 15 inches when armed. More resolute, attach a trip line and this contraption becomes a small yet destructive focal concealed anti-personnel device.