The increase of firearm-related violence has plagued Sweden, and specifically Malmö, for thirty years. This Systematic Literature Review gathered ten articles from different fields in order to discern the causes behind such an increase, the mechanisms of gun violence in a Swedish settings and the implications for Malmö on a criminological level. Results showed that a combination of factors such as the illegal importation of illicit firearms and the expansion of organized criminal groups in vulnerable territories were responsible for a shift of pattern in homicide. This change is preventing the police from properly solving homicide cases and the criminal justice system from prosecuting them. All in all, firearm violence is strongly related to gang activities in the three largest Swedish cities and the reason why Malmö is the most affected may be explained by the large number of clustered near-repeat shootings spread over three neighborhoods considered vulnerable. Actions have been taken though still require some analysis.