The Eleventh Circuit has determined that a Florida conviction attempted armed robbery is not a violent felony because it requires only an attempt to threaten, which falls short of an attempt to use violent force. “To secure a conviction for attempted armed robbery in Florida, the government can prove that a defendant, carrying a weapon, formed an intention to take money or property by force or threat and took one overt act toward that end. This burden falls short of requiring the government to prove that the defendant used, attempted to use, or threatened to use force.”
The full text of United States v. Lightsey can be found here: https://media.ca11.uscourts.gov/opinions/pub/files/202013682.reh.pdf