The Rheinmetall Oerlikon Millennium Gun or Rheinmetall GDM-008 is a close-in weapon system designed by Rheinmetall Air Defence AG for mounting on ships. It is based on the 35/1000 revolver gun land-based air defense system and uses Advanced Hit Efficiency And Destruction (AHEAD) ammunition.

HDMS Absalon (F341) and her sister ship Esbern Snare are the two members of the Absalon class. The lead ship of the class is named after Danish archbishop and statesman Absalon and received full operational status in 2007.