US vs Iran
These weapons are extremely effective in mountainous terrain and in the towns and cities. Iran not only has bought a large number of these weapons but has mass produced them as well. In event of a war Iran can equip tens of thousands of mobile (motor cycles, jeeps, etc), and infantry units with these weapons. In the above mentioned terrain, and with proper motivation, they can be a formidable force. These forces can fan-out from the Western Iran and join the Iraqi Shiite and Sunni insurgents in Iraq. Should this happen, it would be extremely difficult for the US/UK forces to stay in Iraq without suffering very heavy casualties. Their supply lines will also come under tremendous fire in the south (and north). But this is only the land version of the asymmetric war. The important part for the world is the Persian Gulf and the flow of oil.
Dr. Abbas Bakhtiar