BOSTON – Federal authorities in Boston seized two internet domains and two cryptocurrency accounts that were allegedly used for the illegal importation of machine gun conversion devices (MCDs) from China. MCDs commonly known as “switches” or “sears” are parts designed to convert semiautomatic pistols into fully automatic machineguns. Possession of these items and their importation from certain countries, including China, are prohibited under the National Firearms Act (NFA). In addition, during the course of this investigation, 3,093 machine gun conversion devices (switches and auto sears) were seized along with 282 firearms; 124 silencers; and over 12,000 rounds of ammunition.
According to the court documents and the Massachusetts Department of Justice, beginning in 2023 and continuing through 2025, federal authorities began targeting multiple websites, businesses and individuals selling, offering for sale, importing and exporting machinegun conversion devices. Through undercover purchases from the website domains and MCD vendors promoting the sale of NFA-prohibited items – it was confirmed that the domains were being used to sell MCDs. Cryptocurrency accounts used by the MCD vendors to facilitate their sales were also later identified.
To conceal the alleged illegal importation, the contraband items sold from the domains were allegedly smuggled inside air cargo shipments from China to government-controlled mailboxes in the United States. The MCDs were packaged with other goods and were never properly declared with United States Customs…