The Breech Mechanism, cataloged under National Stock Number 1015-01-340-7728, is classified within Federal Supply Class 1015 (Guns, 75mm Through 125mm) of the Weapons group. The manufacturer of record is Army, United States Department of the Dba Watervliet Arsenal Div Business Development. Government technical data includes 1 specification, 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. 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 | 1015-01-340-7728 |
| Primary Part Number | 12591263 |
| Item Name | Breech Mechanism |
| FSC / FSG | 1015 / 10 — Guns, 75mm Through 125mm |
| Manufacturer | Army, United States Department of the Dba Watervliet Arsenal Div Business Development |
| Status | ACTIVE |
| General Characteristics Item Description | C/O THE FOLLOWING MAJOR PARTS: BRACKET SET,PN 12591348;BREECH RING,PN12591134;EXTRACTOR ARTILLERY CARTRIDGE,PN 12591497;SPRING ASSEMBLY BREECH,PN12591346;FIRING PIN ASSEMBLY,PN 12591344 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 12591263 PRIMARY | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (USA) |
NSN 1015-01-340-7728 is a Breech Mechanism, manufactured by Army, United States Department of the Dba Watervliet Arsenal Div Business Development, classified under FSC 1015, Guns, 75mm Through 125mm. Status: active.
NSN 1015-01-340-7728 has 1 manufacturer part number on file: 12591263 (Army, United States Department of the Dba Watervliet Arsenal Div Business Development).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-687-1996. Verify interchangeability with system specifications before substitution.
Key specifications for 12591263: General Characteristics Item Description: C/O THE FOLLOWING MAJOR PARTS: BRACKET SET,PN 12591348;BREECH RING,PN12591134;EXTRACTOR ARTILLERY CARTRIDGE,PN 12591497;SPRING ASSEMBLY BREECH,PN12591346;FIRING PIN ASSEMBLY,PN 12591344; End Item Identification: M119A1 HOWITZER. 1 specification is 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 1015-01-340-7728 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.