The unmanned aerial system (UAS) D4-300 serves as a loitering munition or target and decoy for training ground, sea and air systems for detection, targeting, and firing on enemy aircraft or missile. The unmanned aerial vehicle is optimized for flights up to 300km/h, altitude up to 4000m AMSL and endurance of up to 2 hours.
The D4-300 UAS is the official target UAS of the Bulgarian Air Force. FRAGA X LTD won a public tender in 2022/2023 and signed a 4 year exclusive contract with the Bulgarian Ministry of Defense on 20.04.2023. The Republic of Bulgaria is a member of both NATO (since 2004) and the European Union (since 2007). D4-300 UAS was successfully used by Bulgarian Air Force and Serbian Armed Forces at Shabla 2023 and Shabla 2024 Live Firing Exercises.