PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MK IV/TACTICAL 6,5-20X50 M1Telescope,straight

Leupold & Stevens Inc · NSN 1240-01-591-0611 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-591-0611 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-591-0611. Primary manufacturer part number: MK IV/TACTICAL 6,5-20X50 M1.
Features
  • Telescope,straight — FSC 1240
  • Scale Markings: PROVIDED
  • Straight Type Overall Length: 14.500 INCHES NOMINAL IN
  • Field View Coverage: 14.3 FEET AT 100 YARDS FT
  • Objective Aperture Diameter: 2.0 INCHES NOMINAL IN
  • Focusing Type: ADJUSTABLE
  • Magnification: 19 NOMINAL
  • Open Drawtube Overall Length: 6.500 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Telescope,straight, cataloged under National Stock Number 1240-01-591-0611, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Leupold & Stevens Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1240-01-591-0611
Primary Part NumberMK IV/TACTICAL 6,5-20X50 M1
Item NameTelescope,straight
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerLeupold & Stevens Inc
StatusACTIVE
Scale MarkingsPROVIDED
Straight Type Overall Length14.500 INCHES NOMINAL IN
Field View Coverage14.3 FEET AT 100 YARDS FT
Objective Aperture Diameter2.0 INCHES NOMINAL IN
Focusing TypeADJUSTABLE
Magnification19 NOMINAL
Open Drawtube Overall Length6.500 INCHES NOMINAL IN
Optical Device TypeLENS
Carrying CaseNOT PROVIDED
Magnification TypeVARIABLE
Reticle Style DesignatorCROSSLINE
BracketNOT PROVIDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5815-00-323-7228SM-B-187364 INTERCHANGEABLE
Teletypewriter Subassembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6650-01-421-0838 INTERCHANGEABLE
Filter,light,optical Instrument
5120-01-431-7133 INTERCHANGEABLE
Key Set,socket Head Screw
5340-01-616-156156080 INTERCHANGEABLE
Clamp,loop
Applied Companies
5920-01-654-627356080 INTERCHANGEABLE
Fuse 5A Eh 101
Viavi Solutionsllc
4930-01-672-372456080 INTERCHANGEABLE
Oiler,hand
Dutton-Lainson Company
6530-01-718-719956080 INTERCHANGEABLE
Restraint Set,wrist and Ankle
Armament Systems and Procedures Inc
Cross-Reference Index
Part NumberManufacturer
MK IV/TACTICAL 6,5-20X50 M1 PRIMARY Leupold & Stevens Inc (USA)
56080 Leupold & Stevens Inc (USA)
Related Parts
5815-00-323-7228INTERCHANGEABLE
TELETYPEWRITER SUBASSEMBLY
SM-B-187364
6650-01-421-0838INTERCHANGEABLE
FILTER,LIGHT,OPTICAL INSTRUMENT
5120-01-431-7133INTERCHANGEABLE
KEY SET,SOCKET HEAD SCREW
5340-01-616-1561INTERCHANGEABLE
CLAMP,LOOP
56080
5920-01-654-6273INTERCHANGEABLE
FUSE 5A EH 101
56080
4930-01-672-3724INTERCHANGEABLE
OILER,HAND
56080
6530-01-718-7199INTERCHANGEABLE
RESTRAINT SET,WRIST AND ANKLE
56080

Frequently Asked Questions

What is NSN 1240-01-591-0611?

NSN 1240-01-591-0611 is a Telescope,straight, manufactured by Leupold & Stevens Inc, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-01-591-0611?

NSN 1240-01-591-0611 has 2 cross-referenced part numbers: MK IV/TACTICAL 6,5-20X50 M1 (Leupold & Stevens Inc), 56080 (Leupold & Stevens Inc).

What NSN replaces 1240-01-591-0611?

There are 7 known substitutes for 1240-01-591-0611: 5815-00-323-7228, 6650-01-421-0838, 5120-01-431-7133 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MK IV/TACTICAL 6,5-20X50 M1?

Key specifications for MK IV/TACTICAL 6,5-20X50 M1: Scale Markings: PROVIDED; Straight Type Overall Length: 14.500 INCHES NOMINAL IN; Field View Coverage: 14.3 FEET AT 100 YARDS FT; Objective Aperture Diameter: 2.0 INCHES NOMINAL IN. 14 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com