Effective Communication = A transmitted message in which all parties involved clearly understand the intent of said message. Clip....mag....cartridge....belt....drum....can probably agree, if you say any of them are empty/out; you have effectively communicated you need to reload. Also, although fairly outdated, guns do use clips, the most significant probably being the M1 Garand and popular with revolves (certain types of "speed loaders"), perhaps even the The Last Word using this date technology....