An FFL, or Federal Firearms License, is a license issued by the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) in the United States. It is required for individuals, businesses and entities engaged in certain firearms-related activities, including the manufacturing, importing, selling, or repairing of firearms. FFL holders are subject to federal regulations and are responsible for conducting background checks on purchasers, maintaining records of firearm transactions and adhering to various federal and state laws governing firearms.

There are different types of FFLs, each corresponding to specific firearms-related activities, such as dealers, manufacturers, collectors, and gunsmiths. Obtaining an FFL involves an application process, background checks and compliance with federal and local regulations. FFLs are crucial for regulating and tracking firearms transactions to help ensure public safety and prevent illegal gun sales.