Board Thread:Off Topic/@comment-25396609-20160205001148/@comment-27144409-20160222032306

Metal Storm involves horizontally stacking the bullets and their charges inside the barrel, where the charges are sequentially detonated. This tech was able to turn a single-shot grenade launcher into a three-shot semi-automatic. By detonating all the propellant charges at once, 1,000,000 RPM can be achieved with enough barrels.