Weldon, an FFL is a Federally Licensed Dealer. FFL stands for Federal Firearms License. Established to implement the Federal Firearms Act of 1938, there are several types of FFLs, ranging from Type 1 to Type 11. Generally, all firearm manufacturers and dealers who ship or receive guns and ammunition require an FFL to conduct business, and it forbids them from transferring these items to a customer unless certain conditions are met. ------- nrablog.com/articles/2016/2/buying-and-selling-a-firearm-what-is-an-ffl/

Simple terms it's your local gun shop, they need to receive the firearms you purchase online so they can conduct a background check and then complete the transfer of those firearms.

FFL is a Federal Firearms Lic. that all gun dealers must have to sell guns. It is not legal for someone to ship a firearm in the Us mail but what they don't know won't hurt them if you do just don't ship any ammo with it.