After Red Jacket looses a lucrative contract, Will and Joe have a heart to heart about RJF's future. Will attempts to fit a 25mm Hotchkiss canon inside a pick up truck. Joe prototypes a flying drone, to fire remotely. Will is hand-delivered dreadful news.
A snowmobile is fitted with machine guns; Charlie works on a rare Japanese rifle.
Will is commissioned to make a triple-barrel shotgun.
Joe shows Will the new building; a customer brings a World War II 75mm Scorpion Tank to the shop, and the team quickly learns their new project may lead to some unexpected trouble; Steph and Charlie work on a small revolver.
Joe tries to convince Will to make his building Red Jacket's new home; Will must attach a Mac 11 machine pistol to a Saiga-12 shotgun; Kris snaps; Will learns about the AK-47 deal.
Mounting a long-range rifle to a vehicle; Will wants to debut a prototype, but Joe thinks using a different model makes more sense.