Saw a similar idea a while back. Had 60+ barrels in a square arrangement. Each barrel contained 7 projectiles which were electronically fired individually or in simultaneneous combinations with the other barrels. The firing system was computer controlled so you could actually program a firing sequence by column or row. They showed a clip of it firng and actually drew patterns on the target by programming a firing sequence. Damn.... now I have to go look for it again...
Regards,