This legislation addresses the proliferation of devices designed to convert firearms into machineguns, defining a machinegun conversion device as any part or combination of parts intended solely for this purpose. It mandates that the Attorney General, Secretary of Homeland Security, and Secretary of the Treasury develop and implement a comprehensive strategy within 120 days to prevent or intercept the importation and trafficking of these devices. This strategy will optimize federal law enforcement's capacity for detection and seizure, improve coordination with state and local agencies, and enhance efforts to trace devices used in crimes. It also requires training programs for law enforcement and the collection of data on the origins of seized devices, including those produced domestically or via 3D printing technology. Additionally, the bill amends the Internal Revenue Code to allow for the forfeiture of proceeds derived from the illegal trafficking of machine guns. It further directs the Attorney General to include specific information about machinegun conversion devices, such as their use in crimes and origin, in the annual firearms trafficking report.