More than 400 vendors displayed their products at the Modern Day Marine Exposition Sept. 28-30, 2010, at Marine Corps Base, Quantico, Va. Among the vendors was Nammo Tally Inc., they were displaying a shoulder-launched munitions system called the Serpent. - More than 400 vendors displayed their products at the Modern Day Marine Exposition Sept. 28-30, 2010, at Marine Corps Base, Quantico, Va. Among the vendors was Nammo Tally Inc., they were displaying a shoulder-launched munitions system called the Serpent.