20 x 102mm United States
Details
| Type | New Primed Empty, MK 149 MOD 4 |
|---|---|
| Projectile | [none] |
| Case | brass Markings: (laser etched) 20 MM DS MARK 149 MOD 4 OLM10H001-002 NOT FOR FORWARD FIRING AIRCRAFT ADL-6264393F (black ink) 20MM M103 ACN 10E017-004 |
| Primer | (none) |
| Headstamp | [none] |
| Notes | The load information is laser etched on the case, as opposed to the more traditional ink stamping. |