Metal Storm has created a 36-barreled stacked projectile machine gun, boasting the highest rate of fire in the world. The prototype weapon demonstrated a firing rate of slightly over one million rounds per minute for a 180-round burst. Metal Storm Limited is a research and development company that specialises in electronically initiated stacked projectile weapons technology. Metal Storm is both the name of the company and the technology. The company is based in Brisbane, Australia with a subsidiary in Washington DC, U.S.A. Metal Storm owns the proprietary rights to the electronic ballistics technology invented by J. Mike O'Dwyer. Future Weapons - Terminator Weaponry Prototype. Clips from Discovery and History Channel.