The man was busted transporting gun stocks, bullet shells and used NATO military uniforms.
Customs officials in Ho Chi Minh City detained a Taiwanese man on Sunday for illegally transporting military equipment.
The 31-year-old man was arrested while he was checking in for a flight from Tan Son Nhat International Airport to Kaohsiung in Taiwan after customs and airport security officials saw him acting suspiciously.
A luggage check uncovered 79 new gun stocks, 2 military transmitters, a gas mask, M79 and AR15 bullet shells, grenade shells, military rucksacks and used NATO military uniforms.
The import or export of seized military equipment is illegal in Vietnam.
Police are still investigating the case.