KF-21 Block I
The block I focuses on the air-superiority capabilities.
KF-21 Block II
After further developments, the KF-21 will become a swing role fighters with attack and reconnaissance capabilities added.
Potential variants
KF-21N
In September 2022, KAI unveiled a model of the KF-21N, a carrier-based version of the fighter. In May 2022, the Ministry of National Defense (MND) decided to drop funding for the CVX, a planned small aircraft carrier capable of operating STOVL F-35B jets. It was later clarified that the MND would consider purchasing a larger aircraft carrier design, if a maritime jet fighter could be developed indigenously. Anticipating this, KAI began a preliminary design concept to make the KF-21 carrier-capable. The wings are 20% larger to ensure safety and stabilization when taking off and landing, and they fold for more compact storage. Structural changes would make the airframe capable of CATOBAR and STOBAR operations.
If the Republic of Korea Navy (ROKN) decides to procure an aircraft carrier large enough to operate fighters and identifies a requirement, KAI claims it would be able to build the KF-21N "in a few years.
KF-21EA
One of the three new variants revealed in June 2024. Will serve as an electronic warfare aircraft comparable to the EA-18G Growler. This variant would be based on the two-seat KF-21B, with a position at the back for the electronic warfare officer.
KF-21EX "Block III" (Change name to "EX")
One of the three new variants revealed in June 2024. Will reportedly be a fully stealth variant with reduced radar cross section and internal weapons carriage. It is also expected to integrate the Next Air Combat System (NACS), a combat network for the air force.
KF-21SA
One of the three new variants revealed in June 2024. Will reportedly be a variant specifically dedicated to the export market, with opportunities for the client to modify the aircraft.
