Iran recently opened a factory to produce the Sayyad-2 anti-aircraft missile. This is an upgrade of the Sayyad-1, which was based on the old Russian SA-2 and entered service in 1999. Sayyad 1 and 2 both copied much from the Chinese HQ-2, which is itself an upgrade of the Russian S-75/SA-2 system (from the 1950s). Sayyad-2 appears to have incorporated technology from the American HAWK and Standard surface to air missiles. Sayyad-2 is a two ton, two stage anti-aircraft missile with a maximum range of 80 kilometers and max altitude of 20,000 meters (65,000 feet). The Sayyad-2 has better electronic countermeasures than Sayyad-1 but it is still dependent on the ground radar for guidance to a target and is vulnerable to electronic interference. Sayyad-2 is believed to have a more effective warhead.
The Chinese HQ-2 has been in use since the late 1960s and has been upgraded several times with modern electronics, an improved warhead, better rocket motors, and more maneuverability and turned it into a much more effective HQ-2 early in the 21st century. Iran has been getting military technology from China for over two decades. This apparently included the tech for the solid fuel rocket motors used by the Sayyad-2 and possibly some of the electronics. If an attacker does not have good electronic countermeasures the Sayyad-2 could be quite effective.