The Royal Thai Army (RTA) will soon receive 12 M361 Autonomous Truck-Mounted Mortars (ATMMs). So far, RTA has purchased 22 of the M361 Autonomous Truck-Mounted Mortars. In late 2017, the Thai Ministry of Defense unveiled a new 120mm wheeled self-propelled mortar system called the Autonomous Truck Mounted Mortar (ATMM), developed in collaboration with Elbit Systems to provide fire support for infantry units. The RTA has no current plans to procure additional ATMM batches. The Royal Thai Marine Corps (RTMC) has proposed to procure the system but that the service has not yet signed a contract.
The M361 Autonomous Truck-Mounted Mortar (ATMM) which is based on a 4×4 military truck chassis manufactured by Indian company Tata, is fitted with a new cargo platform with a thickness of 7mm that can carry Elbit System’s Spear 120mm mortar system. The ATMM has a crew of four and can be ready to fire from road position in less than two minutes, with a maximum firing range of 6.5 km and a rate of fire of 10 rounds per minute. The suspension of the truck has also been reinforced. The key advantage of self-propelled mortar artillery mounted on wheeled chassis is that it can be brought into action much faster.
Elbit Systems’ SPEAR is a fully autonomous, soft-recoil 120mm mortar based on a 4×4 light wheeled armoured vehicle. The mortar is a derivative of the combat-proven soft recoil mortar which is muzzle loaded and turntable-mounted and is being used extensively by the US Army, NATO, the Israel .Defense Force and others. The Elbit Systems SPEAR is equipped with cutting-edge fire control, navigation, automatic aiming and propulsion systems, which facilitate a fully-autonomous operation and provide increased fire power and accuracy (within 30 meters of the Circular Error Probability (CEP) radius.