A convicted murderer who pleaded guilty to selling the gun used to kill ex-NFL quarterback Steve McNair has been sentenced to 2 1/2 years in prison.

Thirty-three-year-old Adrian Gilliam, of nearby La Vergne, was sentenced Friday in U.S. District Court in Nashville to 30 months.

Gilliam acknowledged during a court hearing in September that he sold a loaded 9 mm semiautomatic pistol to McNair's mistress for $100.

Nashville police said the woman, 20-year-old Sahel Kazemi, used the weapon to kill McNair and herself on July 4.

Gilliam was arrested about two weeks later and initially pleaded not guilty.