Title: Läckageteorin or the theory of leakage – to burst the institutional filter bubble This bachelor´s thesis investigates both the implicit and direct narrative use of Läckageteorin, or the theory of leakage, in Swedish media debate concerning new provisions from the Swedish environmental protection agency, pertaining to the regulation of gun permits for semi-automatic weapons. The provisions are now relieved from regulation of aesthetic properties, which enables weapons systems like AR-15 to be used for hunting. The study applies Critical discourse analysis on textual content and social interaction to discover the strategic narratives and frames which are used by social media activists to claim and challenge Swedish Police for discursive power in news media, debate articles and on social media. Insights obtained from the analysis reveals that a historical and still dominant narrative of the theory of leakage; ”more legal guns in society leads to more guns used in crime” is filtered by Swedish Police and echoed by the news media. This discourse is challenged mainly by the social media activist Pia Clerté, which supported by research and other debaters had some success in framing the strategic narrative of Läckageteorin as desinformation, conveying the argument of Swedish Police making false claims which unfairly affects Swedish gun owners in negative ways.