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For historical information, Wikipedia has an article on M12 Gun Motor Carriage.
M12 1
Role Self-propelled artillery
Operators United States
No. of positions 1
Position 1 Driver
155mm gun
M12 GMC (Co-op)
Role Self-propelled artillery
Operators United States
No. of positions 2
Position 1 Driver
Position 2 155mm gun

M12 Gun Motor Carriage is an American self-propelled artillery.


The M12 GMC has a 155mm gun derived from the French Canon de 155mm GPF mounted on a modified M3 tank chassis. The 155mm gun is very powerful, but it has a very long reload time, and the vehicle can only can carry 10 rounds. Due to its very limited ammunition capacity, it is usually accompanied by its ammunition carrier variant, the M30 Cargo Carrier.

Because of the massive recoil of the 155mm gun, the vehicle is equipped with a dozer blade at the rear. Like in reality, this can also be lowered to the ground by the driver in Battlegroup42, giving the vehicle a better stability. To achive this, use the up/down keys (same as you would use to lower the ramps of a landing craft).

The M12 GMC can be found in 4409-Nancy and 4411-The Roer Plains.


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