What's the world's smallest gun? - Sure, G.I. Joe's firearm accoutrements are tiny,
but this itty bitty gun actually fires rounds. What is it, and why is it illegal to import it
into the United States?
http://science.howstuffworks.com/smallest-gun-in-world.htm
M107 Sniper Rifle (1:51)
Learn about the M104 sniper rifle, the world's deadliest, high-powered sniper rifle.
http://videos.howstuffworks.com/discovery/4853-m107-sniper-rifle-video.htm