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For historical information, Wikipedia has an article on M21 Mortar Motor Carriage.
M21 mmc 1
Role Self-propelled artillery
Operators United States
Free France
No. of positions 3
Position 1 Driver
Position 2 Mortar
Position 3 12.7mm machine gun

M21 Mortar Motor Carriage is an American self-propelled artillery.


A variant of the M3 Half-track, the M21 Mortar Motor Carriage is equipped with a 81mm M1 mortar in the rear compartment. The M2 Browning machine gun is retained, but is moved further back on a pintle mount.

As an artillery piece, the 81mm mortar does not offer very long range and is not very adequate against enemy armour, but it is still good against soft-skinned targets in relatively close support of friendly units with respectable rate of fire.


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