5.56 x 45mm United States
![5.56 x 45mm Ball M855A1 United States ⊕ LC 09 [SCAMP 12] profile view.](/ctg-images/large/2264-s.jpg)
![5.56 x 45mm Ball M855A1 United States ⊕ LC 09 [SCAMP 12] head view.](/ctg-images/large/2264-h.jpg)
Details
| Type | Ball, M855A1 |
|---|---|
| Projectile | FMJ, copper, steel penetrator, 1 knurled crimping cannelure |
| Case | brass |
| Primer | percussion, flat, brass, 3-stake crimp, purple annulus |
| Headstamp | ⊕ LC 09 [SCAMP 12] |
| Type | Ball, M855A1 |
|---|---|
| Projectile | FMJ, copper, steel penetrator, 1 knurled crimping cannelure |
| Case | brass |
| Primer | percussion, flat, brass, 3-stake crimp, purple annulus |
| Headstamp | ⊕ LC 09 [SCAMP 12] |