The K1A1 is a remodeled and upgraded version of K1, the main battle tank of the South Korean army. It looks similar to the K1 tank. The first test model, made by Hyundai, was shown to the public on April 3, 1996. It went through performance tests for two years from 1999 to 2001. Production began on October 13, 2001. It is planned to produce 484 of them by 2010. The K2 Black Panther is planned to replace it after that.