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M12 Gun Motor Carriage
The 155 mm Gun Motor Carriage M12 was a U.S. self-propelled gun developed during the Second World War.
About this creation
Only 100 M12's were built; 60 in 1942 and a further 40 in 1943. It mounted a 155 mm gun M1917, M1917A1 or M1918 M1, depending upon availability, a weapon derived from the nearly identical French 155 mm GPF gun of World War I vintage. The M12 was built on the chassis of the M3 Lee tank.

It had an armored driver's compartment, but the gun crew were located in an open topped area at the back of the vehicle. An earth spade (similar to a bulldozer blade) at the rear was employed to absorb recoil. This layout—large gun mounted in an open mount at the rear, with a spade—was the pattern adopted for many years by other heavy self-propelled artillery.

During 1943 the vehicles were used for training or put into storage. Before the invasion of France, 74 M12s were upgraded in preparation for combat operations. They were employed successfully throughout the campaign in NW-Europe. Although designed primarily for indirect fire, during assaults on heavy fortifications the M12s were sometimes employed in a direct-fire role.

Limited storage space meant that only 10 projectiles and propellant charges could be carried on the vehicle. Given this, a similar vehicle, but without the gun, was produced as the Cargo Carrier M30. This was designed to transport the gun crew and additional ammunition. In operational conditions the M12 and M30 would serve in pairs. The M30 was armed with a .50-caliber Browning M2 machine gun. It could carry 40 rounds of 155 mm ammunition.

The sole surviving M12 GMC is displayed at the Fort Sill museum. It was perviously stored at the United States Army Ordnance Museum in Aberdeen, Maryland, USA, before being transferred to Fort Sill in November 2010.

Weight - 26 tons
Length - 6.7 m
Width - 2.7 m
Height - 2.7 m
Crew - 6 (Commander, driver, (4x) gun crew)
Main armament - 1x 155mm M1917 M1 gun w/10 rounds
Engine - Continental R975 EC2
Range - 220 km
Speed - 38 km/h, 19 km/h off road

Building instructions
Download building instructions (LEGO Digital Designer)


Nathan Elkins
 I like it 
Tried Cascade13
  June 29, 2012
Nice smooth and versatile.
 I like it 
  June 29, 2012
This is actually one of my favourite WWII veicles. >Eric
 I like it 
  June 29, 2012
Another outstanding build. I like seeing the "oddball" builds! It is great to see the AFVs that no one else creates. Your armored corps is expanding rapidly!! :)
 I like it 
  June 29, 2012
I see you're having fun with the Sherman chassis.
 I like it 
  June 29, 2012
Nicely done!!
 I like it 
  June 29, 2012
Excellent! Very real!
 I like it 
  June 29, 2012
Indeed, your build rate is something else. And the quality is great, excellent work!
 I like it 
  June 28, 2012
Man you're working fast!
 I like it 
  June 28, 2012
HOLY COW! This is the only one of these i have seen, and i have been looking! The detail is great! You really did a good job on the rollers! Great design! I hope you get more likes! 5/5
By Nathan Elkins
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Added June 28, 2012

LEGO models my own creation MOCpages toys shop M12 Gun Motor CarriageMilitary

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