MGX may refer to: Magix, a German software company MGM Energy, a Canadian oil company (TSX ticker:MGX) Montenegro Airlines (1994–2020, ICAO:MGX) Mysterious Girlfriend X, a Japanese manga (2004–2014) Magnesium halide (MgX) .MGX, a brand of Materialise NV, a Belgium 3D printers' MGX (company), an Emirati investment firm SureFire MGX, a prototype machine gun