Iran unveiled an upgraded version of Bavar-373 (Belief-373) surface-to-air missile, and also inaugurated the production line of the long-range Sayad B4 missile on Sunday. During the test, the upgraded radar of the homegrown Bavar-373 managed to detect a target at a distance of more than 450 km, and track the target at a distance of about 405 km before destroying it at a range of over 300 km.