New York, NY—The cold-blooded, brazen murder of a UnitedHealth CEO recently reignited the national conversation about so-called “ghost guns.” But what exactly is a ghost gun, aside from being a sensationalized propaganda term? At its core, it is simply a firearm without a serial number. The push for serial numbers and gun registration has long been a favored strategy of politicians aiming to infringe on Second Amendment rights when outright bans on firearms were politically or constitutionally untenable. The end goal has often been the creation of a comprehensive registry to track every firearm in the United States—something that could facilitate future confiscation schemes if a total gun ban were ever implemented. Do Serial Numbers and Gun Registration Actually Solve Crimes? A basic application of common sense suggests they do not. The only time a firearm is typically left at a crime scene is when the criminal is incapacitated—dead or wounded—or caught in the act. In such cases, t...