A hurricane isn’t the only thing brewing in this season's premiere. A blacklisted visitor shows up mid storm. An important order's mishandling wreaks havoc on the shop; meanwhile the largest weapon in Red Jacket history may also prove to be the most problematic.

Will and Joe head out to Jordan for some high level meetings and leave the SOCOM order still hanging in the balance. Kris takes on a stubborn Solothurn without Will’s permission. Will comes back to face a harsh reality.

With the SOCOM order still on hold Will is on edge so he decides to clean house. He builds a hybrid gun out of Red Jacket spare parts. Will keeps the boys busy on an R & D project, and has an explosive confrontation with Vince.

Flem modifies an MK-7 for a sub-machine gun champ’s upcoming competition. In the meantime, desperate for revenue, Will agrees to overhaul a rusted out anti-tank cannon. Tempers flare between Joe and Kris as the missing SOCOM barrels put everyone on edge.

Money is tight, Red Jacket has gone into the red and cutting down on OT causes tempers to flare. Steph brings in the Olympic shooting team to make a commemorative gun. Will has the crew build an MG-34 for two clients in order to keep the doors open.

In an exciting challenge the crew modifies a PKM from a three man to a one-man combat unit. Will restores a Lefever rifle destroyed in a tornado. Kris makes a deal hoping he'll save Red Jacket but when Will gets bad news, he's ready to close RJF forever.

As the SOCOM order finally gets completed, Tom's unpredictable ways put his job on the line. Will and Flem have a heart to heart about his future at RJF. The crew is challenged when a client brings in an Oerlikon that sent him to the hospital once before.

In this season finale, Will is asked to build a sniper rifle for the sheriff but RJF isn't the only shop in the running. Will is faced with overcoming much more than a gun build. The contract and prides are at risk, when a key part doesn't arrive on time.