M12

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M12

Icon
USA SPG Tier VII
Battle Tiers
123456789101112
Totals
Cost 1,400,000  Credits
Hit Points 350350 HP
Weight Limit 26.84/2726.84/27 t
Crew
Commander
Gunner
Driver
Radio Operator
Loader
Loader
Mobility
Engine Power 400500 hp
Speed Limit 38.6/10 km/h
Traverse 1820 deg/s
Power/Wt Ratio 14.914.9 hp/t
Pivot YesYes
Armor
Hull Armor 50/19/19 mm
Armament
Damage 713-1188938-1563 HP
Penetration 64-10666-110 mm
Rate of Fire
2.11100% crew: 2.2 rpm
+ BiA : 2.25 rpm
+ Food: 2.35 rpm
1.6100% crew: 1.67 rpm
+ BiA : 1.71 rpm
+ Food: 1.78 rpm
r/m
Accuracy
0.76100% crew: 0.73 m
+ BiA : 0.71 m
+ Food: 0.68 m
0.72100% crew: 0.69 m
+ BiA : 0.67 m
+ Food: 0.65 m
m
Aim time
7100% crew: 6.71 s
+ BiA : 6.55 s
+ Food: 6.3 s
7.5100% crew: 7.19 s
+ BiA : 7.02 s
+ Food: 6.75 s
s
Gun Traverse Speed
12100% crew: ? deg/s
+ BiA : ? deg/s
+ Food: ? deg/s
12100% crew: ? deg/s
+ BiA : ? deg/s
+ Food: ? deg/s
deg/s
Gun Arc -14°/+14°
Elevation Arc -5°/+45°-3°/+45°
Ammo Capacity 2020 rounds
General
Chance of Fire 2020 %
View Range
370100% crew: 370 m
+ BiA : ? m
+ Food: ? m
370100% crew: 370 m
+ BiA : ? m
+ Food: ? m
m
Signal Range
325100% crew: 338.93 m
+ BiA : 346.59 m
+ Food: 361.91 m
750100% crew: 782.14 m
+ BiA : 799.82 m
+ Food: 835.18 m
m
Parent Contour-USA-M44.png
Child
Contour-USA-M40M43.png116,500 XP
Research
RT-USA-M12.jpg
Values are Stock - click for Top
USA-M12.png

The M12 is an American tier 7 self-propelled gun.

The M12 was developed by the Rock Island Arsenal on the chassis of the M3 Lee and mounted the 155mm M1 "Long Tom" gun. A total of 100 vehicles were manufactured. American soldiers dubbed the vehicle King Kong. The M12 fought well in battles on the Siegfried Line.

It is not all that different from the M41. The 155 mm Gun M1A1 does have a slightly higher rate of fire than the other tier 6 SPGs and has decent accuracy as well. As is par for the American SPGs it has a slow hull traverse speed, but a respectable top speed and acceleration.

The M12 leads to the M40/M43.


















Modules

Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
06VI 155 mm Gun M1918M1 20 950/950 HP 85/90 mm 1,120 Credits/13 Gold
2.11100% crew: 2.2 rpm
+ BiA : 2.25 rpm
+ Food: 2.35 rpm
r/m
0.76100% crew: 0.73 m
+ BiA : 0.71 m
+ Food: 0.68 m
m
7100% crew: 6.71 s
+ BiA : 6.55 s
+ Food: 6.3 s
s
-5°/+45° --- 61,20061,200 Credits 3,953 3,953 kg
07VII 155 mm Gun M1A1 20 1250/1250 HP 88/90 mm 1,120 Credits/13 Gold
1.6100% crew: 1.67 rpm
+ BiA : 1.71 rpm
+ Food: 1.78 rpm
r/m
0.72100% crew: 0.69 m
+ BiA : 0.67 m
+ Food: 0.65 m
m
7.5100% crew: 7.19 s
+ BiA : 7.02 s
+ Food: 6.75 s
s
-3°/+45° 15,500 96,50096,500 Credits 4,352 4,352 kg

Engine
TierNamePowerFire ChanceTypeXP CostPriceWeight
04IV Wright Continental R-975C1 0400 400 hp 020 20 % Gasoline --- 11,00011,000 Credits 0516 516 kg
05V Wright Continental R-975C4 0460 460 hp 020 20 % Gasoline 1,500 13,90013,900 Credits 0550 550 kg
06VI Ford GAA early 0500 500 hp 020 20 % Gasoline 5,100 29,00029,000 Credits 0708 708 kg

Suspension
TierNameLoad LimitTraverse SpeedXP CostPriceWeight
06VI M12T48 002727 t 01818 d/s ------ 14,60014,600 Credits 11,000 11,000 kg
07VII M12T51 29.529.5 t 02020 d/s 7,9657,965 19,70019,700 Credits 11,000 11,000 kg

Radio
TierNameRangeXP CostPriceWeight
04IV SCR 510
325100% crew: 338.93 m
+ BiA : 346.59 m
+ Food: 361.91 m
325100% crew: 338.93 m
+ BiA : 346.59 m
+ Food: 361.91 m
m
0--- --- 1,9801,980 Credits 0080 80 kg
06VI SCR 610
420100% crew: 438 m
+ BiA : 447.9 m
+ Food: 467.7 m
420100% crew: 438 m
+ BiA : 447.9 m
+ Food: 467.7 m
m
1,480 1,480 24,60024,600 Credits 0100 100 kg
10X SCR 619
750100% crew: 782.14 m
+ BiA : 799.82 m
+ Food: 835.18 m
750100% crew: 782.14 m
+ BiA : 799.82 m
+ Food: 835.18 m
m
9,000 9,000 54,00054,000 Credits 0080 80 kg

Historical Info

M12 155mm self-propelled gun firing across the Moselle River in France, 1944.

The 155 mm Gun Motor Carriage M12 was a U.S. self-propelled gun developed during the Second World War. Only 100 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 (some sources claim that later M12 used the M4 Sherman chassis, but this might be a confusion with the M12's use of "Sherman-style" bogie trucks with trailing idlers). 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, a 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 [1]. It was stored at the United States Army Ordnance Museum in Aberdeen, Maryland, USA, before being transferred to Fort Sill in November 2010.


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