The Action Block,upper, cataloged under National Stock Number 1005-01-631-4044, is classified within Federal Supply Class 1005 (Guns, Through 30mm) of the Weapons group. The manufacturer of record is Colt's Manufacturing Company, Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1005-01-631-4044 |
| Primary Part Number | 400933 |
| Item Name | Action Block,upper |
| FSC / FSG | 1005 / 10 — Guns, Through 30mm |
| Manufacturer | Colt's Manufacturing Company, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 1005-01-631-4044 is a Action Block,upper, manufactured by Colt's Manufacturing Company, Llc, classified under FSC 1005, Guns, Through 30mm. Status: active.
NSN 1005-01-631-4044 has 2 manufacturer part numbers on file: 400933 (Colt's Manufacturing Company, Llc), SP400933 (Colt's Manufacturing Company, Llc).
Key specifications for 400933: Part Name Assigned by Controlling Agency: UPPER RECEIVER ACTION BLOCK; End Item Identification: M4 COLT CARBINE AND M4 COLT COMBO. 0 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 1005-01-631-4044 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.