Series 7: The Contenders (2001)
Series 7: The Contenders is a 2001 cult dark comedy directed by Daniel Minahan. The movie is presented as a marathon of the seventh series of an American reality television show called The Contenders, where six people, picked at random from a national lottery, are each given a pistol and forced to hunt and kill each other for the cameras. The film is a dark satire of the reality television genre. It stars Brooke Smith as Dawn, the reigning champion from the fifth and sixth series.
More at Wikipedia.