20 x 102mm United States
Details
| Type | TP-T, M220 |
|---|---|
| Projectile | steel, aluminum windscreen, blue, orange Ts, 1 copper driving band Projectile Markings: (white ink) 20 MM TP-T M220 LC 32-197 Driving Band Markings: GLN-23-27-74 M221 |
| Case | brass, choke crimp Markings: (black ink) 20 MM M103 RNO-3-72-74 |
| Primer | electric, flat, brass, ring crimp, red annulus |
| Headstamp | [none] |