K2 Black Panther (Hangul: K2 '흑표'; Hanja: K2 '黒豹') is a South Korean main battle tank that will replace most of the various models of M48 Patton tanks and complement the K1 series of main battle tanks currently fielded by the Republic of Korea. K2 are not mass-produced due to serious troubles of transmission and main engine. However, The K2 Black Panther is the second most expensive tank in the world behind only the AMX-56 in price cost. A single K2 unit costs over US$8.5 million per unit.
In March, 2011, South Korea's Defense Acquisition Program Administration (DAPA) announced that mass production of the K2, which the Army was expecting to deploy in 2012, will not happen until 2013 due to problems concerning its engine and transmission. In April 2012 DAPA announced that due to ongoing issues with the reliability and durability of the domestically-produced powerpack, the first 100 production K2s would use a German engine and transmission and that service entry would be delayed until March 2014.
Main armament: L55 120 mm smoothbore gun, Rheinmetall licensee (developed under license by the Agency for Defense Development and manufactured by World Industries Ace Corporation). This is complemented by an autoloader, similar to that designed for Leclerc, it can fire about 15 - 20 rounds a minute or every 3 – 4 seconds and reloads about every 1 – 2 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.
Secondary Weapons: 12.7 mm K-6 heavy machine gun; 7.62 mm coaxial machine gun.