The Tosan is an Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

ian light tank

Light tank

A light tank is a tank variant initially designed for rapid movement, and now primarily employed in low-intensity conflict. Early light tanks were generally armed and armored similar to an armored car, but used tracks in order to provide better cross-country mobility.The light tank was a major...

, for unconventional warfare. Production started in 1997, but the tank was only produced in small numbers. Mass production started in 2008. Colonel Nasser Arab-Beigi, head of the self-sufficiency unit of the IRGC ground forces announced the mass-production of this 'Quick Reaction' tank on June 30, 2008, as part of the country's campaign for defense self-sufficiency. Iran calls it a 'Quick Reaction' tank because the tank is said to be capable of rapid response and is built for strategic missions. It appears to be based on the British FV101 Scorpion

FV101 Scorpion

The FV101 Scorpion is a British armoured reconnaissance vehicle. It was the lead vehicle and the fire support type in the Combat Vehicle Reconnaissance , CVR, family of seven armoured vehicles...

 (where Iran has 80 in service), the tank is fitted with a 90 mm gun, Toophan

Toophan

Toophan is an Iranian anti-tank missile that is a reverse-engineered copy of the US military TOW missile. The Toophan's payload is a 3.6 kg high-explosive anti-tank warhead that can penetrate up to 550mm of steel armor. The range is 3,850m, the top speed 310m/s...

missile launchers and an improved firing and targeting systems. The tank can drive long distances on its tracks and does not need to be carried on trucks.