He must report by noon Tuesday to the Federal Correction Institution at Forrest City, Ark. His sentence is for a year and a day.
The 28-year-old rapper, whose real name is Clifford J. Harris Jr., was arrested after trying to buy unregistered machine guns and silencers from undercover federal agents in 2007.
T.I. performed in front of about 16,000 people at Philips Arena.
T.I. won a Grammy for "Swagga Like Us" that he performed with Jay-Z.
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