Like its predecessor, this Metal Storm sentry gun prototype is capable of firing up to 1,000,000 rounds per minute. See it in action after the jump.
The stacked projectile and electronic ignition technology eliminated the need for cartridges, and for many moving parts associated with traditional guns. Multiple barrels containing stacked rounds could be grouped together in arrays allowing unprecedented (albeit very brief) rates of fire of up to 1,000,000 rounds per minute