M110 155mm Cartridge


The M110 155 Projectile is an artillery shell used by the U.S. Army and U.S. Marine Corps. Originally designed as a chemical artillery round, the design was later repurposed. Variants of the original shell are used for marking, signaling, and screening purposes. Because they are typically filled with white phosphorus, the shells also have a secondary, incendiary effect.

Original design

The original shell, the M110 155mm projectile, was a hollow steel shell that typically contained about of Sulfur mustard H or HD blister gas.

Design variants

There are two design variants of the original M110 155mm shell that are used today; the A1 and A2 variants. Both variants are similar, although differ in some aspects. The A1 is primarily used for signaling and screening, while the A2 is used for screening and marking targets. The A2 weighs about, about of which is white phosphorus.

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