The modelguns cannot use any live or blank cartridges. Instead, the modelguns use special designed cartridges dedicated to each model. The design of cartridges changed along with the evolution of modelguns and cap technology. Modelgun cartridges were developed and evolved over time for improved performance and realism. The "firing" of the cap inside the cartridge of commonly available modelguns today produces the visual effect of sparks/smoke, audible effect of bang sound and blowback action for automatic models. After firing, these cartridges can be reusable upon cleaning and refilling the cap. Modelgun cartridges are in general not compatible among different manufacturers or different models. Different manufacturers have their own cartridge design and nomenclature as well as the parts count/description.