Sons of Guns (2011)

S3E6 Worlds Largest Machine Gun

Red Jacket faces a challenge when a 70-year-old, $150,000 fully automatic 40mm Bofors cannon, consisting of more than 500 components, malfunctions just four days before its scheduled sale. Meanwhile, the team works to restore an 1855 Volcanic Pistol. Additionally, a .38 Special reveals hidden markings that point to its royal ancestry.