South Korean K2 Black Panther Main armament: L55 120 mm smoothbore gun, Rheinmetall licensee. This is complemented by an autoloader, similar to that designed for Leclerc, it can fire up to 20 rounds a minute or every 3 seconds, without being affected by the gun's angle. The ammunition for the main gun is loaded in a 16-shell magazine, with a total ammunition capacity of 40.