The film, part a series called "Andrew Young Presents," is expected to begin airing Nov. 2 on TV stations around the country.
"Violence would still be around without guns," T.I. said to over 400 attendees during a question-and-answer session after the screening. "But there would be an increased value of life."
The 76-year-old Young - a veteran civil rights activist who went on to become a Georgia congressman, President Carter's ambassador to the U.N. and Atlanta's mayor - began filming this year shortly after he began to mentor T.I., 28. The rapper, whose real name is Clifford Harris, pleaded guilty to several charges last March and was sentenced to prison time, community service and supervised home detention. His community service includes warning young people about the pitfalls of guns, gangs and drugs.
"Some of my colleagues are disappointed with me taking this young man in," Young said of T.I. "But sometimes us old folks have to shut up and listen to the young folks to understand where they are coming from."