The proliferation of ballistic missiles and artillery rockets to non-state actors by the Islamic Republic of Iran is a constant source of tension in the Middle East. Yemen’s Houthi rebels conduct ballistic-missile strikes on Saudi Arabian cities, airports and oil installations; Hizbullah’s ever-growing rocket and missile arsenal sparks Israeli consideration of military options; and Iranian proxies rocket the United States’ installations in Iraq on an almost weekly basis.

But how does Iran equip its proxies and allies with increasingly sophisticated and longer-range ballistic missiles and artillery rockets? For years, the answer has been through smuggling. In one example, on 19 March 2021 Saudi Minister of State for Foreign Affairs Adel al-Jubeir claimed that all Houthi missiles fired at the Kingdom were ‘made in Iran’, and there is ample evidence that Houthis were the recipients of weapons such as Iran’s short-range Qiam ballistic missile. Iran doubtlessly continues to directly transfer missiles outside its borders to some degree. However, in recent years smuggling has been augmented by two other transfer methods: the provision of guidance kits to modify existing stockpiles of artillery rockets, and the wholescale provision of manufacturing capabilities.

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Read the rest of the report at the International Institute for Strategic Studies.