Basic Information:
| Item Name: | EXTENSION |
| NSN: | 1005 - 00 - 556 - 4139, 1005005564139 |
| FSC: | FSC 1005 - GUNS, THROUGH 30MM |
| NIIN: | 005564139 |
Manufacturer Part Numbers:
| Part Number: | 5564139 |
| Manufacturer: | US ARMY ARDEC RDECOM |
| NCAGE: | 19200 |
| Part Number: | 5564139 |
| Manufacturer: | ARMY UNITED STATES DEPARTMENT OF!THE!DBA ROCK ISLAND ARSENAL |
| NCAGE: | 19204 |
| Part Number: | 5564139 |
| Manufacturer: | SPRINGFIELD ARMORY |
| NCAGE: | 19205 |