Rocco and Eli restore a tank from the Cold War that has been out of action for over 30 years, before helping a customer identify an explosive device from WWII.

Rocco suggests the idea of constructing a suppressor for a Revolutionary War cannon; a customer arrives with a mysterious item from WWII.

Rocco tries to rush the modernisation of a Tommy gun from the 1930s; the team assist a client with the restoration of a flamethrower from WWII.

When Rocco wants to create a bazooka, the team equips a motorcycle sidecar with an assault rifle; Eli comes across a revolver fashioned like those from the days of the Old West.

Rocco and Eli ask the team to make a Civil War gatling gun hand-held and mobile; the team examine a client's 16th-century wall gun.

Rocco and the team create the ultimate 21-gun salute using a 21-barrel flintlock; they do a restoration job on a M1903 Springfield rifle.