Various guns were used, until a true dueling pistol was officially standardized in 1777, as "a 9 or 10 inch barreled, smooth bore flintlock of 1 inch bore, carrying a ball of 48 to the pound." ...

The flintlock pictured here is a typical British "Brown Bess" musket. Marks on the gun indicate that it was used by German mercenaries during the American Revolution. 1637 - First use of firearms ...