20 x 102mm United States
Details
| Type | SAPHEI, PGU-28/B |
|---|---|
| Projectile | steel, aluminum windscreen, yellow with red and black bands, 1 copper driving band Projectile Markings: (white ink) WM-89D006-001 20MM |
| Case | brass, choke crimp Markings: (black ink) 20MM M103 ACN 89F006-984 |
| Primer | none |
| Headstamp | [none] |
| Notes | Factory inert display round. |