PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7266131Barrel,machine Gun

Army, United States Department of the Dba Rock Island Arsenal Jmtc · NSN 1005-00-726-6131 · FSC 1005 · No Item Name Available
Verified by PartsTable
NSN 1005-00-726-6131 — this item is cataloged by the U.S. Government under National Stock Number 1005-00-726-6131. Primary manufacturer part number: 7266131.
Features
  • Barrel,machine Gun — FSC 1005
  • Surface Treatment: PHOSPHATE MANGANESE OUTSIDE
  • Rifling Direction: RIGHT-HANDRIGHT-HAND
  • Surface Treatment Document and Classification: QQ-C-320 CLASS 2A FED SPEC SINGLE TREATMENT RESPONSE INSIDE A
  • FSC Application Data: MACHINE GUN,CAL..50
  • Material: STEEL
  • Land Width: 0.044 INCHES NOMINAL0.044 INCHES NOMINAL IN
  • Weapon Size Designation: .50 CALIBER.50 CALIBER
Applications
  • Applications requiring Steel construction
General Description

The Barrel,machine Gun, cataloged under National Stock Number 1005-00-726-6131, is classified within Federal Supply Class 1005 (No Item Name Available) of the Weapons group. The primary manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1005-00-726-6131
Primary Part Number7266131
Item NameBarrel,machine Gun
FSC / FSG1005 / 10 — No Item Name Available
ManufacturerArmy, United States Department of the Dba Rock Island Arsenal Jmtc
StatusACTIVE
Surface TreatmentPHOSPHATE MANGANESE OUTSIDE
Rifling DirectionRIGHT-HANDRIGHT-HAND
Surface Treatment Document and ClassificationQQ-C-320 CLASS 2A FED SPEC SINGLE TREATMENT RESPONSE INSIDE A
FSC Application DataMACHINE GUN,CAL..50
MaterialSTEEL
Land Width0.044 INCHES NOMINAL0.044 INCHES NOMINAL IN
Weapon Size Designation.50 CALIBER.50 CALIBER
Groove Width0.135 INCHES MINIMUM AND 0.135 INCHES MINIMUM AND 0.140 INCHES MAXIMUM0.140 INCHES MAXIMUM IN
Rifle Bore Groove Quantity88
Size Designation.50 CALIBER.50 CALIBER
Caliber Quantity Per Rifling Turn1 TURN IN 30.000 CALIBERS1 TURN IN 30.000 CALIBERS
Weapon Model NumberM2M2
Surface TreatmentCHROMIUM INSIDE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
6105-01-173-9774A-203-12 INTERCHANGEABLE
Motor,alternating Current
Hansome Energy Systems Inc
4730-01-443-5127A-203-12 ITEM 72 INTERCHANGEABLE
Nipple,pipe
Hansome Energy Systems Inc
4730-01-443-5146A-203-12 ITEM 74 INTERCHANGEABLE
Cap,pipe
Hansome Energy Systems Inc
Cross-Reference Index
Part NumberManufacturer
1005PL1557660 Jednolity Indeks Materialowy - Uniform Material Index (POL)
1005007266131 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
7266131 PRIMARY Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA)
A20533 Fnh Uk Ltd (GBR)
A20313 Fnh Uk Ltd (GBR)
A20312 Fnh Uk Ltd (GBR)
Related Parts
6105-01-173-9774INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
A-203-12
4730-01-443-5127INTERCHANGEABLE
NIPPLE,PIPE
A-203-12 ITEM 72
4730-01-443-5146INTERCHANGEABLE
CAP,PIPE
A-203-12 ITEM 74

Frequently Asked Questions

What is NSN 1005-00-726-6131?

NSN 1005-00-726-6131 is a Barrel,machine Gun, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 1005 (No Item Name Available). Status: active.

What are the part numbers for NSN 1005-00-726-6131?

NSN 1005-00-726-6131 has 6 cross-referenced part numbers: 1005PL1557660 (Jednolity Indeks Materialowy - Uniform Material Index), 1005007266131 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 7266131 (Army, United States Department of the Dba Rock Island Arsenal Jmtc), A20533 (Fnh Uk Ltd), A20313 (Fnh Uk Ltd) and 1 more.

What NSN replaces 1005-00-726-6131?

There are 3 known substitutes for 1005-00-726-6131: 6105-01-173-9774, 4730-01-443-5127, 4730-01-443-5146. Verify interchangeability with system specifications before substitution.

What are the specifications of 7266131?

Key specifications for 7266131: Surface Treatment: PHOSPHATE MANGANESE OUTSIDE; Rifling Direction: RIGHT-HANDRIGHT-HAND; Surface Treatment Document and Classification: QQ-C-320 CLASS 2A FED SPEC SINGLE TREATMENT RESPONSE INSIDE A; Overall Length: 45.000 INCHES NOMINAL45.000 INCHES NOMINAL IN. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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