
| Type | HEI, M56A4 |
|---|---|
| Projectile | steel, steel fuze, yellow with red band, 1 copper driving band Projectile Markings: (black ink) A-0-2-11-81 M56A4 |
| Case | brass, choke crimp, 1 hole Markings: (black ink) 20MM M103 ACN 85E006-016 |
| Primer | none, brass |
| Headstamp | [none] |
| Notes | The projectile is empty and the fuze has no internal components. |