Lance Cpl. Austin Nelson, front, races, Sgt. Joshua Houck to reassemble a MK 19 40 mm automatic grenade launcher Nov. 14 while participating in the weapons relay during the Shanghai Commanders’ Cup at Camp Schwab. The weapons relay tested teams of Marines to disassemble and reassemble six weapons ranging from the smallest, M9A1 9 mm service pistol, and progressing to the largest, MK 19 40 mm automatic grenade launcher. Nelson is from West Jordan, Utah, and a machine-gunner with 1st Battalion, 1st Marine Regiment, currently assigned to 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force, under the unit deployment program. Houck is from Rochester, New York, and a machine-gunner with 1st Battalion, 3rd Marines, currently assigned to 4th Marines. - Lance Cpl. Austin Nelson, front, races, Sgt. Joshua Houck to reassemble a MK 19 40 mm automatic grenade launcher Nov. 14 while participating in the weapons relay during the Shanghai Commanders’ Cup at Camp Schwab. The weapons relay tested teams of Marines to disassemble and reassemble six weapons ranging from the smallest, M9A1 9 mm service pistol, and progressing to the largest, MK 19 40 mm automatic grenade launcher. Nelson is from West Jordan, Utah, and a machine-gunner with 1st Battalion, 1st Marine Regiment, currently assigned to 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force, under the unit deployment program. Houck is from Rochester, New York, and a machine-gunner with 1st Battalion, 3rd Marines, currently assigned to 4th Marines.