Little Hummingbird Stings Like a Bee

In 1914, Austrian watchmaker Georg Grabner created the Kolibri, the "Hummingbird" pistol. The smallest autoloading pistol ever made, it fires a .11 caliber bullet. He marketed it as a self-defense firearm for women to carry in their purses.
That is a 5 round magazine next to a 3mm cartridge. That translates to a .11 caliber bullet.
The tiny 3 grain bullet has a muzzle velocity of about 650 feet per second. That means that the gun has about 1/2 the power that my air pistol produces. The projectile is so small that it would certainly penetrate if you shot someone's bare skin, but it also means that I really can't conceive of it doing anything but pissing an attacker off. Unless you managed to shoot his eye out, of course.
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