The Breech Mechanism, cataloged under National Stock Number 1010-01-559-4057, is classified within Federal Supply Class 1010 (Guns, Over 30mm up to 75mm) of the Weapons group. The manufacturer of record is Fn America Llc Div Columbia, Sc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1010-01-559-4057 |
| Primary Part Number | 49033 |
| Item Name | Breech Mechanism |
| FSC / FSG | 1010 / 10 — Guns, Over 30mm up to 75mm |
| Manufacturer | Fn America Llc Div Columbia, Sc |
| Status | ACTIVE |
| 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 |
|---|---|
| 49033 PRIMARY | Fn America Llc Div Columbia, Sc (USA) |
NSN 1010-01-559-4057 is a Breech Mechanism, manufactured by Fn America Llc Div Columbia, Sc, classified under FSC 1010, Guns, Over 30mm up to 75mm. Status: active.
NSN 1010-01-559-4057 has 1 manufacturer part number on file: 49033 (Fn America Llc Div Columbia, Sc).
1 possible match (shared part number, not a government interchangeability claim): 5130-01-585-0979. Verify interchangeability with system specifications before substitution.
Key specifications for 49033: End Item Identification: MK48 MOD0 LIGHTWGHT MACHINE GUN. 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 1010-01-559-4057 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.