According to police, a loaded gun was found in a rear door of Ja Rule's luxury sports car when it was stopped for speeding after a July 2007 concert.
The 35-year-old performer pleaded guilty in December to attempted weapon possession. He agreed to a two-year prison term.
He said on "Good Day New York" Monday that "laws are laws," and he's been trying to prepare himself mentally for prison.
Ja Rule was nominated for a 2002 best rap album Grammy Award for "Pain is Love." His movie credits include 2001's "The Fast and the Furious" and 2003's "Scary Movie 3."
The Associated Press contributed to this report.