While we're on the topic of war and mass destruction, check this thing out:
http://www.metalstorm.com/videos/ms_36barrel_mpg.zip - Demonstrates firing 9mm rounds at a maximum of 1,000,000 rpm. (14 MB video)
http://www.metalstorm.com/04_videos/...ngonly_mpg.zip - Demonstrates firing 40mm grenade rounds at a maximum of 3,000 rpm. (12 MB video)