John Popp and NRA Museums firearms specialist Logan Metesh continue their series on the history of concealed carry at the 2017 NRA Carry Guard Expo. This week it's Deringer's Derringer, made by Henry Deringer himself. It's cute! It's the baby or peanut-size single-shot .41 caliber pistol, made in Philadelphia circa 1850. It was perfect for concealed carry at the time, easy to put in a pocket.