Sometimes, you want to show up holding a really big gun. Let people know you mean business, by hoisting a honking great shooter that you can barely hoist. But sometimes, subtle is best. When you want to be sneaky, or just really cute, with your choice of firearm, there's always these teeny tiny pistols.
The 2.7 mm Kolibri Car Pistol, designed by an Austrian watchmaker named Franz Pfannl, introduced in 1914.
The cigarette case with a built-in electrically powered weapon that shot tiny bullets tipped with cyanide. It was used by a Soviet spy named Nikolai Khokhlov who was sent to Germany to assassinate an anti-Communist agitator.
Each hole is actually a gun barrel, which gets activated with the push of a button.
A miniature (4" long with a 2 3/8" barrel of .152 caliber) wheellock pistol from the late 16th or early 17th century