Host Paul Shull has been invited by his friend, a military enthusiast and mechanic, to assist him on a once in a lifetime project: to rebuild the incredibly rare Achilles Tank Destroyer.

Host Paul Shull takes a journey through Tennessee, Kentucky and Oregon to find and fire the deadliest pieces of light field artillery of the Civil War: the 10lb Parrott and the 3-inch Ordnance Rifle.

To military history collectors, it's the rarest of all machine guns. The FG-42 assault rifle, designed specifically for German World War II paratroopers, is so rare that they now sell for thousands of dollars at auctions.

It's fast, ferocious, powerful, and ultra-rare. The mobile machine gun called the Quad 50 was one of the most punishing weapons of World War II, but it's rarely seen today.

The flamethrower is one of the most terrifying weapons in existence, capable of launching a 2,200-degree wall of fire over 100 feet.