"Ghost guns" seized in federal law enforcement actions are displayed at the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) field office in Glendale, California on April 18, 2022. - President Joe Biden recently announceed new measures cracking down on so-called "ghost guns", with an executive order set to increase restrictions on the weapons that can be assembled at home in minutes and are difficult to trace as they lack serial numbers. "It's as simple as going on to the internet, going to a website or a company that sells the firearms components and ordering them and they will be shipped overnight to your front door," says Michael Hoffman, Assistant Special Agent in Charge at the Los Angeles ATF Field Division. (Photo by Robyn Beck / AFP) (Photo by ROBYN BECK/AFP via Getty Images)Photo: Getty Images