GDF-001/-003

The Oerlikon GDF is a series of towed twin-barrel anti-aircraft autocannons, primarily designed for short-range air defense. It fires 35x228mm ammunition and has been widely adopted by numerous countries, including Turkey.

Developed by Oerlikon Contraves in the late 1950s, this weapon system was designed to counter the emerging threat of high-speed, low-altitude jet aircraft. The initial GDF-001 variant entered active military service in the early 1960s, often paired with advanced radar-guided fire control systems like Super Fledermaus and Skyguard. The system saw significant combat deployment during the 1982 Falklands War, where Argentine forces utilized it against British aircraft, as well as during the Iran-Iraq War. Today, the GDF series remains in active service worldwide, having undergone numerous modernization programs to maintain relevance against modern drone and precision-guided threats.