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M256 120mm Smoothbore Cannon

The M256 120mm gun is the primary armament on the U.S. M1A1 and M1A2 series of main battle tanks. The M256 is a high velocity, quick-firing, accurate, direct fire weapon used primarily against enemy tanks and hard targets. It is the U.S. version of the German Rheinmetall 120mm L44 smoothbore gun.
M256 120mm Smoothbore Cannon Copyright © Gunnery Sgt. Robert K. Blankenship, U.S. Marine Corps

Characteristics

Dimensions
Barrel length: 530 centimeters 208.7 inches
Weight
Weight: 3 084.43 kilograms 6 800 pounds
Features
Effective range: 3 000 meters