The Gunsmoke crew creates a historically inspired hybrid: an axe mortar gun. A client gets an extra surprise with his Trapdoor Springfield, a replacement for his lost, childhood gun. The Wyatts fly out to NASCAR driver Regan Smith's home for a gun deal.
The Gunsmoke team prototypes a new helicopter M-16 machine gun as a new business venture and rebuilds a 44 Magnum for a British ex-pat. A group of professional BMX stunt riders challenge Rich to a wager for some 1911s.
The Gunsmoke crew, led once again by Scott, builds a massive avalanche-triggering gun with two interchanagable barrels for a 50 calibre and a 20mm bullet. A female shooter orders an AR-10 with a grenade launcher to take back to her women's pistol league.
The Wyatts and the Gunsmoke crew are back, building a huge, historical punt gun. Rich trades pistols for some personal Elvis memorabilia. He calls in some special help to deliver and test a 1911 for an Army 10th Mountain Division veteran.
A Navy Veteran commissions a Nock gun. Meanwhile, a Florida Gator hunter orders a rifle powerful enough to take down alligators. Later, Rich and Kurt meet with a weapons designer to purchase an arsenal of custom, indestructible ARs.
The Gunsmoke crew build a special motorcycle shotgun for a retired New York firefighter who served during 9/11. They customize a 1911 for a retired Air Force customer who has lessened strength in his hand after an accident.
Rich and the crew recreate an 1866 Winchester Yellow Boy for a cowboy client. Renee and Paige bring out an arsenal to host a special shooting event for local firefighters.
A young, fast Cowboy Action Shooter commissions Gunsmoke to build him a competition Winchester rifle and challenges Jon to a shoot out. Meanwhile, Paige helps an exotic animal rescuer custom order a S&W MP and takes his project from sale to reveal.
Rich barters for two pieces of history: an M1 Garand used during DDay and a Luger used in Howard Hughes' 1930s film "Hell's Angels". Meanwhile, the Gunsmoke crew races the clock to modify a hunter's favorite rifle for Alaska's deadly big game.
In the season finale, Kurt takes the lead on a client's customized Barrett. Rich and Bob examine two very rare Colts. The gunsmiths face off against the sales team to see who's the better shot.