Six String Samurai

SixString Samurai is a 1998 postapocalyptic actioncomedy film directed by Lance Mungia, starring Jeffrey Falcon and Justin McGuire. Brian Tyler composed the score for this film along with the Red Elvises, the latter providing the majority of the soundtrack.

In 1957, the Soviet Union attacks the United States with nuclear weapons, rendering most of the nation uninhabitable. The American government has collapsed with the exception of the haven known as Lost Vegas, ruled by King Elvis. The Red Army has been besieging Lost Vegas, but the lack of supplies over the years has relegated them to a gang of thugs. Forty years after the Soviet invasion, King Elvis dies and radio disc jockey Keith Mortimer announces a call for all musicians to come to Lost Vegas to try to become the new King of Rock n Roll.Buddy, a lone guitarist and swordsman, saves an unnamed boy he simply calls Kid from a group of bandits consequently, as the Kids mother was killed by the bandits, he tags along with Buddy. As the duo travel through the desert wasteland, the heavy metalplaying Death stages several attempts to prevent Buddy from reaching Lost Vegas alive and claim the throne to himself. After enduring a host of opponents such as a bountyhunting bowling team, a cannibalistic suburban family, a band of underground mutants, and the Red Army, a wounded Buddy squares off against Death in a sword fight. Death mortally wounds Buddy, but the Kid discovers water as Deaths weakness after spitting at him. The Kid then melts Death away with a canteen full of water. Buddys lifeless body disappears, but the Kid puts on his clothes and glasses before continuing his journey toward Lost Vegas. ........

Source: Wikipedia