Bunch of Five (1998)

Jonas and Emir are members of a criminal gang of 14-15 year-olds in Oslo. Emir has slight brain-damage after being beaten by his father as a 5-year-old, and Jonas' biggest problem is stopping Emir from hitting people on the head. One day, they are offered a job by a gang of drug-dealers: Deliver a packet of heroin to one guy and beat up another. This is the start of a chain of events that sends their lives spiraling out of control.