The Trigger, cataloged under National Stock Number 1005-00-556-4378, is classified within Federal Supply Class 1005 (Guns, Through 30mm) of the Weapons group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1005-00-556-4378 |
| Primary Part Number | 5564378 |
| Item Name | Trigger |
| FSC / FSG | 1005 / 10 — Guns, Through 30mm |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| FSC Application Data | SUBMACHINE GUN,CAL..45 |
| Attachment Facility and Component Accommodated | DRILLED,DISCONNECTOR |
| Attachment Facility and Component Accommodated | DRILLED,DISCONNECTOR SPRING |
| Attachment Facility and Component Accommodated | DRILLED,TRIGGER SPRING |
| Weapon Model Number | M1A1 |
| Pivot Hole Diameter | 0.313 INCHES NOMINAL IN |
| Weapon Size Designation | .45 CALIBER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5564378 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 1005-00-556-4378 is a Trigger, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 1005, Guns, Through 30mm. Status: active.
NSN 1005-00-556-4378 has 1 manufacturer part number on file: 5564378 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 5564378: FSC Application Data: SUBMACHINE GUN,CAL..45; Attachment Facility and Component Accommodated: DRILLED,DISCONNECTOR; Attachment Facility and Component Accommodated: DRILLED,DISCONNECTOR SPRING; Attachment Facility and Component Accommodated: DRILLED,TRIGGER SPRING. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1005-00-556-4378 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.