The Case,optical Instrument, cataloged under National Stock Number 1240-01-617-2479, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. Government technical data includes 6 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 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 | 1240-01-617-2479 |
| Primary Part Number | 26187-1 |
| Item Name | Case,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Charles Reed Knight Jr Dba Knight's Armament Company |
| Status | ACTIVE |
| Moisture Resistance Feature | NOT INCLUDED |
| Specific Equipment Accommodated | OPTICAL LENS |
| Fungus Resistant Feature | NOT INCLUDED |
| Handling Facility Type | BELT STRAP |
| Closure Fastening Type | SNAP LOCK |
| Closure Method | FLAP |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 26187-1 PRIMARY | Charles Reed Knight Jr Dba Knight's Armament Company (USA) |
NSN 1240-01-617-2479 is a Case,optical Instrument, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-617-2479 has 1 manufacturer part number on file: 26187-1 (Charles Reed Knight Jr Dba Knight's Armament Company).
1 possible match (shared part number, not a government interchangeability claim): 1560-01-650-3066. Verify interchangeability with system specifications before substitution.
Key specifications for 26187-1: Overall Height: 10.50 INCHES NOMINAL IN; Moisture Resistance Feature: NOT INCLUDED; Specific Equipment Accommodated: OPTICAL LENS; Overall Width: 4.50 INCHES NOMINAL IN. 6 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.
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.