The R-Darter is a beyond visual range (BVR) air-to-air missile guided by an active radar homing seeker.
The South African air-to-air missile program benefited from cooperation with Israel [3] during the 1980s and the R-Darter is very similar to the Python Derby.
The missile armed the South African Air Force's Cheetah C fighter aircraft and was withdrawn from service when those were retired in 2008.
The SAAF has not yet publicly announced which BVR missile will be procured to equip the 26 Saab JAS 39 Gripens which have replaced the Cheetahs.
The Brazilian Air Force is said to be evaluating the R-Darter for use with their F-5 fighters since Denel will be selling the missiles used for the test at a low price, as they are nearing the end of their shelf-life.