The KAI KF-X is a joint South Korean and Indonesian multirole fighter aircraft development program with the goal of producing an advanced multirole fighter for the South Korean and Indonesian air forces. The airframe is stealther than other 4th generation fighters but does not carry weapons in one or more internal bays like 5th generation fighters. The program is led by South Korea, which holds 80% of shares. Indonesia joined in 2010 for 20% (although its ongoing participation is in doubt), and the remainder is held by private partners including manufacturer Korean Aerospace Industries (KAI). The KAI KF-X is South Korea's second domestic fighter jet development program, following the FA-50.