PartsTable TECHNICAL DATA SHEET
NSN 1240-01-643-2866Government record, cited

Mount, Telescope1240-01-643-2866

NSN 1240-01-643-2866 · NIIN 016432866
FSC 1240 — Optical Sighting and Ranging Equipment · FSG 12 — Fire Control Equipment
Government record, cited
Also searched as  1240-01-643-2866 · 1240016432866 · NIIN 016432866 · 01-643-2866 · FSC 1240 Optical Sighting and Ranging Equipment
Nearby stock numbers  ·
Features
  • Mount,telescope — FSC 1240
Identification
  • NSN: 1240-01-643-2866
  • NIIN: 016432866
  • FSC: 1240 — Optical Sighting and Ranging Equipment
  • FSG: 12 — Fire Control Equipment
General Description

The Mount,telescope, cataloged under National Stock Number 1240-01-643-2866, 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and Ranging Equipment) of the Fire Control Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
ParameterValue
NSN1240-01-643-2866
Item NameMount,telescope
FSC / FSG1240 / 12 — Optical Sighting and Ranging Equipment
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
AWP 8110-34M 3/9 Design control — primary reference
Operational Product Supply and Services Llc
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 1240-01-643-2866?

NSN 1240-01-643-2866 is a Mount,telescope, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.

What are the specifications of 1240-01-643-2866?

Key specifications for 1240-01-643-2866: Special Features: ONE PIECE 34MM RING SET WITH 0 MOA DOWNWARD BIAS, 1.5 INCH CENTERLINE HEIGHT. INCLUDES FIELD PARTS KIT AND ANTI-CANT MODULE. FOR USE WITH PSR DAYSCOPES (NSN: 1240-01-599-9400 AND NSN: 1240-01-610-4844) ON THE MK13 AND MK21 SERIES SNIPER RIFLES. WIDTH: 2.1 IN; HEIGHT: 2.5 IN; LENGTH: 4.875 IN; WEIGHT: 0.59 LBS. LBS. 0 specifications are documented in the U.S. Government catalog.

Is NSN 1240-01-643-2866 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.
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