Most of the Glock switch shipments had come from China, and were destined for various locations throughout the United States, CPB said.

Customs agents in Chicago said they seized thousands of illegal Glock switches shipped into the city last year, according to a statement Tuesday from the U.S. Customs and Border Protection.

Automatic fire conversion switches for handguns are not legal to use or possess. The president-elect said he had an “obligation” to attack one specific late night host. A photo shared by Vice President Kamala Harris from Jimmy Carter's funeral has gone viral due to the exclusion of President-elect Donald Trump.

Most of the Glock switch shipments had come from China, and were destined for various locations throughout the United States, CPB said.