South Korea has rolled out the first production-standard KF-21 Boramae fighter jet, marking a significant milestone in the nation’s defense industry and signaling Seoul’s growing ambitions in the global combat aircraft market. The rollout, which took place on March 25, 2026, at the Korea Aerospace Industries (KAI) facility in Sacheon, was attended by President Lee Jae-myung.
The event underscores the strategic importance of the KF-21 program as South Korea strives for greater defense self-reliance, a goal pursued for over two decades since the program’s inception in the early 2000s.
KF-21 Fighter Reaches Production After 25-Year Push for Defense Autonomy
The KF-21 program originated from a need to replace South Korea’s aging fleet of F-4 and F-5 fighter jets. Over the years, it has evolved into a major aerospace project involving domestic industry, government agencies, and international collaboration, notably with Indonesia.
President Lee described the aircraft as a symbol of “self-reliant defense,” emphasizing that South Korea now possesses the capability to independently design and produce advanced fighter aircraft. “South Korea has finally secured weapons to protect peace with its own technology, not only on land and sea but also in the air,” Lee stated during the rollout ceremony.
KF-21 Boramae: South Korea’s 4.5-Generation Multirole Fighter
The KF-21 is designed as a multirole combat aircraft intended to bridge the gap between fourth and fifth-generation fighters. KAI states the aircraft delivers air superiority and precision strike capabilities, focusing on survivability, networked operations, and sustainment efficiency.
The aircraft is equipped with an active electronically scanned array (AESA) radar, infrared search and track (IRST), electro-optical targeting systems, and an integrated electronic warfare suite. It is powered by General Electric F414 engines, capable of speeds approaching Mach 1.8, with a ferry range of around 1,550 nautical miles and a maximum payload of approximately 17,000 pounds.
KF-21 Production Ramps Up with 40 Aircraft Planned by 2028
The KF-21 development program was launched in 2015. Current plans call for the KF-21 Block 1 configuration to enter service with the Republic of Korea Air Force from 2026, with an initial batch of 40 aircraft scheduled for delivery by 2028.
The Blk. 1 standard will primarily focus on air-to-air operations, replacing older fighter fleets. A more advanced Blk. 2 configuration is under development, expanding the aircraft’s role to include air-to-ground missions, integrating weapons such as the GBU-31 Joint Direct Attack Munition and GBU-39 Small Diameter Bomb.
KF-21 Upgrades to Add Electronic Warfare and Internal Weapons Capability
KAI has outlined a roadmap for the platform, including specialized variants like the KF-21EA, designed for suppression of enemy air defenses, and the KF-21EX, which is expected to incorporate internal weapons carriage to reduce radar signature and improve survivability.
The aircraft’s modular design is intended to support incremental upgrades, allowing new systems and capabilities to be integrated without a complete redesign.
South Korea Targets Indigenous Engine Development for KF-21
Even as the KF-21 represents a major step forward, the program still relies on imported components, most notably its engines. President Lee indicated the government intends to increase indigenous content, including developing a domestically produced “Advanced Aero Engine” to eventually replace the GE F414. Efforts are also underway to localize materials, subsystems, and key technologies to strengthen the country’s defense industrial base.
KF-21 to Support Crewed-Uncrewed Teaming in Future Combat Operations
South Korea is exploring how the KF-21 could operate alongside uncrewed systems. Officials have outlined plans to develop the aircraft into a platform capable of supporting manned-unmanned teaming (MUM-T), allowing it to control or operate with autonomous aircraft in future combat scenarios.
KF-21 Export Ambitions Grow as Global Interest Builds
Even before entering full service, the KF-21 is gaining international traction. Indonesia remains a key prospect, with Seoul reportedly preparing to finalize a deal for 16 aircraft. Other countries, including the UAE and Poland, have also expressed interest. The KF-21 is positioned as a more accessible alternative to fifth-generation fighters, offering lower operating costs and a flexible upgrade path.
As President Lee stated, “The success of the KF-21 jet does not simply mean strengthening defense capabilities but signifies that South Korea has secured new momentum to compete with the world’s leading defense powers.”