The Breech Mechanism, cataloged under National Stock Number 1010-01-538-9306, is classified within Federal Supply Class 1010 (Guns, Over 30mm up to 75mm) 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 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1010-01-538-9306 |
| Primary Part Number | 6197102 |
| Item Name | Breech Mechanism |
| FSC / FSG | 1010 / 10 — Guns, Over 30mm up to 75mm |
| Manufacturer | Army, United States Department of the Dba Watervliet Arsenal Div Business Development |
| Status | ACTIVE |
| Overall Diameter | 5.465 INCHES NOMINAL IN |
| General Characteristics Item Description | THIS IS A BREECH BLOCK CLOSING CASE COVER |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6197102 | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (USA) |
| Reference | Meaning |
|---|---|
| 200820274-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1010-01-538-9306 is a Breech Mechanism, manufactured by Army, United States Department of the Dba Watervliet Arsenal Div Business Development, classified under FSC 1010, Guns, Over 30mm up to 75mm. Status: active.
NSN 1010-01-538-9306 has 1 manufacturer part number on file: 6197102 (Army, United States Department of the Dba Watervliet Arsenal Div Business Development).
Key specifications for 6197102: Overall Diameter: 5.465 INCHES NOMINAL IN; General Characteristics Item Description: THIS IS A BREECH BLOCK CLOSING CASE COVER; Part Name Assigned by Controlling Agency: CASE, BREECH CLOSING SPRING, LEFT; End Item Identification: 40 MILLIMETER AUTO CANNON, M2 AND M2A1. MM. 3 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 1010-01-538-9306 has DEMIL Code B. 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.