Rocco pitches the crazy idea to construct a suppressor for a Revolutionary War Cannon. Also, a Banditos client tasks the team with reviving his Browning M1919 Machine Gun. Another customer has something mysterious from World War II.
Military vets Rocco and Eli restore a Cold War Tank that's been inoperable for over 30 years. They also create their own version of a Blunderbuss and help a customer identify a mysterious Japanese explosive device from WWII.