I'd love to see the ATF come in and try to arrest him,

"The Miami Police Department plans to hold a gun buyback this Saturday at Miami City Hall, which it is calling “GUNS 4 UKRAINE.” Police are offering gift cards in exchange for the weapons: $50 for a handgun, $100 for a shotgun or rifle and $150 for what the department calls a “high powered rifle (.223 caliber, AR-15, AK-47).”
According to Miami Police Public Information Officer K. Fallat – who declined to provide her first name – the firearms “bought back” will be sent to the Ukrainian military to help in their war against Russia.
“It is my understanding that the guns are going to be shipped off to Ukraine,” Officer Fallat said Wednesday.
Therein lies the problem: shipping firearms to a foreign country without proper export license violates federal law, specifically the International Traffic in Arms Regulations, known as ITAR."

https://m.flsenate.gov/Statutes/790.08