SONS OF GUNS centers on Will's Red Jacket shop, located in the heart of the Louisiana bayou. When Will isn't rebuilding a "bring-back" rifle from the Vietnam War or using his wealth of weapon history knowledge to determine if a pistol found in the attic is an antique or not, he can be found in his shop with his daughter Stephanie and the rest of his team, swapping gossip with his customers. Whether it's having a lunch break shooting contest, going on a nighttime bayou bow fishing trip or field testing a fully automatic M2 .50 caliber machine gun, viewers will catch the Red Jacket team always finding time to have some fun on SONS OF GUNS. 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. 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 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. 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. 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.