I don't know about it being the smallest but it's interesting.
Video - The Smallest Handgun in the World - ToxicJunction.com
Feel free to watch the Video (as it is firearm related) but, be forewarned that the posted comments beneath it are quite foul.
So should you happen to be a forum member that is bothered by that trash typing by ignorant human beings...simple answer:
Watch the Video and don't scroll further on down the page.
added by QKShooter