1. The ATF has changed the definition of "engaged in the business" of dealing in firearms, which has expanded the licensing requirements for individuals and entities involved in the sale of firearms. The new definition includes individuals who repeatedly buy and sell firearms with the principal objective of earning a profit, even if they do not have a physical storefront or maintain an inventory of firearms. This change is aimed at addressing the issue of unlicensed firearms dealers operating out of their homes or online.

2. The expanded licensing requirements mean that individuals who meet the new definition of "engaged in the business" will need to obtain a federal firearms license (FFL) from the ATF. This includes individuals who may have previously been able to sell firearms without an FFL, such as collectors or hobbyists. The ATF has stated that these changes are necessary to ensure that all individuals involved in the business of dealing in firearms are properly licensed and subject to the appropriate regulations.

3. The article notes that the ATF's changes to the "engaged in the business" definition have been met with some criticism and concern from gun rights advocates and industry groups. They argue that the new definition is overly broad and could inadvertently capture individuals who are not truly operating as unlicensed firearms dealers. The article suggests that there may be legal challenges to the ATF's actions in the future.