SEATTLE (AP) — A nonfunctional missile launcher was among the weapons that showed up Saturday at a gun buyback event in Seattle.

SeattlePI.com reports (http://is.gd/LIWxep ) say the military weapon was a single-use device that had already been used. Police say a man who was at the event bought the surface to air missile launcher for $100. It was confiscated by police to determine what it was. Then the nonfunctioning device was returned to him.

The gun buyback in a parking lot in downtown Seattle was scheduled to go from 9 a.m. to 3 p.m., but ended early because of the large crowd. Police say that after two hours, more than 160 guns had been turned in and $35,000 in gift cards had been distributed. Other buybacks are planned for later this year.

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Information from: Seattle Post-Intelligencer, http://www.seattlepi.com/