Tiny concealable guns have a great amount of variety and can be found in all sorts of shapes and disguises. This website known as Club Little Gun has a large collection of small weaponry and many interesting pictures of historical guns used throughout history. Their collection of small concealed antique weaponry has examples of everything from a crucifix gun to a fishing hook gun that shoots your fish when you hook it! Some truly interesting stuff even if you're not a "gun nut." Check it out HERE.
Pictured Above: A ring pistol. Think twice before shaking an enemy's hand.