The Sight,bore,optical, cataloged under National Stock Number 1240-01-643-1780, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Leupold & Stevens Inc. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-643-1780 |
| Primary Part Number | MARK 4 12-40X60MM |
| Item Name | Sight,bore,optical |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Leupold & Stevens Inc |
| Status | ACTIVE |
| Magnification | 12.0 MINIMUM AND 40.0 MAXIMUM |
| Magnification Type | VARIABLE |
| Optical Device Type | LENS |
| Focusing Type | ADJUSTABLE |
| Bracket | NOT PROVIDED |
| Field View Coverage | 3.2 DEGREES ON LOW TO 1.0 DEGREE ON HIGH |
| Carrying Case | NOT PROVIDED |
| Objective Aperture Diameter | 60.0 MILLIMETERS NOMINAL MM |
| Scale Markings | NOT PROVIDED |
| Straight Type Overall Length | 315.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| MARK 4 12-40X60MM PRIMARY | Leupold & Stevens Inc (USA) |
NSN 1240-01-643-1780 is a Sight,bore,optical, manufactured by Leupold & Stevens Inc, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-643-1780 has 1 manufacturer part number on file: MARK 4 12-40X60MM (Leupold & Stevens Inc).
Key specifications for MARK 4 12-40X60MM: Magnification: 12.0 MINIMUM AND 40.0 MAXIMUM; Magnification Type: VARIABLE; Optical Device Type: LENS; Focusing Type: ADJUSTABLE. 10 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.