Rapper Young Buck officially checked into prison today (August 6).
TMZ.com reports that the G-Unit rapper started an 18-month prison sentence, for possessing a gun.
The weapon was found in August of 2010, when IRS agents raided his mansion over back taxes.
Agents found a weapon in the house which was not registered to, or legally owned by the rapper.
Young Buck will serve his time at that Yazoo City Medium Security Federal Prison, in Southern Mississippi.