The Armor,supplemental,small Arms-Fr, cataloged under National Stock Number 2540-01-609-3980, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is Ati, Inc. Dba Alloy Technology Innovation. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Item Name | Armor,supplemental,small Arms-Fr |
| FSC / FSG | 2540 — Vehicular Furniture and Accessories (FSG 25) |
| Manufacturers | Oshkosh Defense Llc (CAGE 75Q65); Ati, Inc. Dba Alloy Technology Innovation (CAGE 54QY8) |
| Parameter | Value |
|---|---|
| NSN | 2540-01-609-3980 |
| Primary Part Number | 52101 |
| Item Name | Armor,supplemental,small Arms-Fr |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | Ati, Inc. Dba Alloy Technology Innovation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
NSN 2540-01-609-3980 is a Armor,supplemental,small Arms-Fr, manufactured by Ati, Inc. Dba Alloy Technology Innovation, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-609-3980 has 2 manufacturer part numbers on file: 4005213 (Oshkosh Defense Llc), 52101 (Ati, Inc. Dba Alloy Technology Innovation).
2 possible matches (shared part number, not a government interchangeability claim): 2540-01-681-6986, 1005-01-710-5992. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 2540-01-609-3980 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.