U.S. Customs and Border Protection said it recently made an unusual seizure at a port in California.
Agents in Long Beach intercepted three shipments containing nearly 53,000 sights, stocks and other gun parts that came illegally from China.
"There was no attempt to hide the importation," Jaime Ruiz told NPR on Friday. He said the gun parts were correctly labeled and still had their original trademarks. And all three shipments were headed to a legitimate seller and distributor.
"It's kind of an unusual situation," Ruiz said.