FSC: 1240 — Optical Sighting and Ranging Equipment
FSG: 12 — Fire Control Equipment
General Description
The Mount,sight, cataloged under National Stock Number 1240-01-604-2779, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1240-01-604-2779
Item Name
Mount,sight
FSC / FSG
1240 / 12 — Optical Sighting and Ranging Equipment
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
9-BT-21262
3/9Design control — primary reference
L-3 Communications Eotech, Inc. Dba Eotech
No interchangeability data on file.
Other items in FSC 1240 — Optical Sighting and Ranging Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1240-00-764-4734
SUNSHADE
1240-00-987-5071
1240-00-987-5071 · Item name not on file
1240-01-068-6676
HOLDER,OPTICAL ELEMENT
1240-01-082-8849
SIGHT,INFINITY
1240-01-090-0609
1240-01-090-0609 · Item name not on file
1240-01-102-4266
1240-01-102-4266 · Item name not on file
1240-01-110-9897
1240-01-110-9897 · Item name not on file
1240-01-361-6090
COLLIMATOR,INFINITY AIMING REFER
Frequently Asked Questions
What is NSN 1240-01-604-2779?
NSN 1240-01-604-2779 is a Mount,sight, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
What are the specifications of 1240-01-604-2779?
Key specifications for 1240-01-604-2779: Special Features: LOW PROFILE POSITIONED MOUNT FOR MP5,33,53,91,93,94 M16,M4 AND VARIOUS OTHER WEAPON SYSTEMS,MAINTAINS CHEEK-WELD AND SUPPORTS NV OPERATIONS.HWS MOUNTS TO ANY UNIVERSAL PICATINNY MOUNTING RAIL(OTHER THEN 553 SUPPORTS 1" WEAVER DOVETAIL). 0 specifications are documented in the U.S. Government catalog.
Is NSN 1240-01-604-2779 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.