https://www.pbs.org/newshour/politics/the-flow-of-guns-from-the-u-s-to-mexico-is-getting-lost-in-the-border-debate
For example, the report found that from 2014 to 2016, 49 percent of crime guns seized in El Salvador were originally purchased in the U.S. In Honduras, 45 percent of guns recovered in crime scenes were traced to the United States as well.