A man standing outside a weapons buyback event in Seattle on Saturday bought a missile launcher for $100 from another person, reports SeattlePI.com.
As a controlled military item, the missile launcher is not available to civilians through any surplus or disposal programs.
The military weapon was a single-use device and had already been used. The weapon was confiscated by police, and they replaced it with a gift card.
Police said the missile launcher was taken to determine what exactly it was and that the non-functioning weapon could be later returned to the man.