The Sight Unit, cataloged under National Stock Number 1240-01-580-9836, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Safran Electronics & Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-580-9836 |
| Primary Part Number | 189198788 |
| Item Name | Sight Unit |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Safran Electronics & Defense |
| Status | ACTIVE |
| Supplementary Features | A LIGHTER, SMALLER VERSION OF THE MODEL 552, THE MODEL 551 OFFERS THE SAME DURABILITY AND FUNCTION, BUT IN A MORE COMPACT UNIT; THIS SIGHT TAKES UP LESS VALUABLE RAIL SPACE, LEAVING MORE ROOM FOR A REAR IRON SIGHT OR NV MOUNT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 189198788 | Safran Electronics & Defense (FRA) |
| Reference | Meaning |
|---|---|
| 551.A65 | 3/9 Design control — primary reference L-3 Communications Eotech, Inc. Dba Eotech |
NSN 1240-01-580-9836 is a Sight Unit, manufactured by Safran Electronics & Defense, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-580-9836 has 1 manufacturer part number on file: 189198788 (Safran Electronics & Defense).
Key specifications for 189198788: Supplementary Features: A LIGHTER, SMALLER VERSION OF THE MODEL 552, THE MODEL 551 OFFERS THE SAME DURABILITY AND FUNCTION, BUT IN A MORE COMPACT UNIT; THIS SIGHT TAKES UP LESS VALUABLE RAIL SPACE, LEAVING MORE ROOM FOR A REAR IRON SIGHT OR NV MOUNT; Special Features: LENGTH: 4 INCHES; WIDTH: 1.8 INCHES; HEIGHT: 2.25 INCHES; WEIGHT: 8.8 OZ; WATERPROOF: SUBMERSIBLE TO 33 FT DEPTH; COLOR: BLACK; FINISH: HARD COAT FINISH; MOUNT: RAIL; RETURN TO ZERO: REPEATABLE TO 2 MOA AFTER RE-MOUNTING; NIGHT VISION BRIGHTNESS RANGE: 1,000:1 WITH NV SWITCH ENGAGED; POWER SOURCE: 2X N TYPE 1.5V ALKALINE BATTERIES; BATTERY LIFE: 200 CONTINUOUS HOURS V. 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 1240-01-580-9836 has DEMIL Code C. 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.