Iron & Fire (2016)

Season 1: Episode 7

Daniel sets out to build a cannon from salvaged materials and it's going to have some fearsome firepower. But first, Daniel has to help a friend with one of the most dangerous jobs a gunsmith ever attempts: removing a musketball stuck inside the barrel of a rifle. Working on a loaded gun with a .50 caliber round jammed inside means the slightest miscalculation can cost him a limb... or even his life.