An FFL is a federal license in the United States that enables the individuals in the country or companies to engage in businesses and importation manufacturing of firearms and ammunition.
It has been a legal requirement in the united states for one to hold an FFL for them to engage in specific activities; this is ever since the enactment of the gun control acts in the US in 1968. The FFL license is issued by ATF that is the bureau of alcohol tobacco firearms and explosives.
There are still procedures that FFL to follow but regards to the personal firearms collection to stay compliant with ATF. Check ffltrust.com to get more information on how to obtain a federal license.