Basic Information:
| Item Name: | MAINSPRING |
| NSN: | 1005 - 00 - 344 - 8935, 1005003448935 |
| FSC: | FSC 1005 - GUNS, THROUGH 30MM |
| NIIN: | 003448935 |
Manufacturer Part Numbers:
| Part Number: | R132 |
| Manufacturer: | O. F. MOSSBERG & SONS, INCORPORATED |
| NCAGE: | 41758 |
| Part Number: | 7311900 |
| Manufacturer: | ARMY UNITED STATES DEPARTMENT OF!THE!DBA ROCK ISLAND ARSENAL |
| NCAGE: | 19204 |