The U.S. is an importer of illegal drugs, and an exporter of illegal firearms (i.e. firearms whose sale is legal, even protected in the U.S., but illegally smuggled into countries that would like to control firearms...)
The Guardian has the story:
Guns and weapons trafficked from US fueling Haiti gang violence. Experts say most guns smuggled from states with lax firearms laws such as Florida, Arizona and Georgia. by Oliver Laughland
"As Haiti has again plunged into violent chaos, images of gang members bearing high-powered rifles, pump-action shotguns or automatic weapons in the streets of Port-au-Prince have become ubiquitous.
"But this weaponry is not made in Haiti, a country with no firearms or ammunition manufacturing capabilities.
"It is an arsenal that largely comes directly from the US, with most guns, experts say, likely to have originated from states with lax firearm laws, and many trafficked into Haiti from Florida.
"This clandestine trade has left Haiti’s gangs with a vast cache of illegal arms and much greater firepower than the country’s dispirited and underfunded police force.
...
"Joly Germine, a 31-year-old leader of 400 Mawozo, directed specific requests for high-powered weapons via WhatsApp messages sent from a Haitian prison. The requests were made to US citizens in Florida, including Germain’s romantic partner, and the weapons were then stuffed in garbage bags, loaded into large barrels and hidden under “clothes, shoes and Gatorade” ready for shipment.