The TCM-20 was an Israeli SPAA built on the chassis of the M3 half-track. After World War II, the Israel Defence Forces used various weaponry imported from the USA, including M3 half-tracks equipped with the M45 machine gun mount. However, the firepower of the .50 cal M2 Browning machine guns used in them was no longer satisfactory for the military. In 1969, to increase the firepower of these vehicles, Israeli forces modified the machine gun mount, replacing the machine guns with two Hispano-Suiza HS.404 20 mm cannons repurposed from decommissioned IAF aircraft. Production continued throughout the 1970s, with a total of 370 to 500 units produced. Besides the M3 half-track, the gun mounts were also installed on the Soviet BTR-152.

Introduced in Update "Fire and Ice" alongside the initial Israeli ground tree, the TCM-20 is a compact SPAA with good manoeuvrability, and armed with fast-firing 20 mm cannons which allows it to effectively deal with both late piston-engine and early jet aircraft at low altitudes. Furthermore, the presence of armour-piercing belts makes the TCM-20 an effective hunter of lightly armoured vehicles. However, the TCM-20 itself has rather light armour.