PartsTable TECHNICAL DATA SHEET

JULY 2026Technical Data Sheet

46121Barrel,machine Gun

Name: 46121
SKU: 1005-01-658-6401

Fn America Llc Div Columbia, Sc · NSN 1005-01-658-6401 · FSC 1005 · No Item Name Available

Verified by PartsTable

NSN 1005-01-658-6401 — this item is cataloged by the U.S. Government under National Stock Number 1005-01-658-6401. Primary manufacturer part number: 46121.

1005-01-658-6401 — No Item Name Available illustration

Features

Barrel,machine Gun — FSC 1005
1 verified cross-reference
Primary manufacturer: Fn America Llc Div Columbia, Sc

Applications

Industrial maintenance and repair
Government and military logistics
Equipment overhaul and refurbishment

General Description

The Barrel,machine Gun, cataloged under National Stock Number 1005-01-658-6401, is classified within Federal Supply Class 1005 (No Item Name Available) of the Weapons group. The primary manufacturer of record is Fn America Llc Div Columbia, Sc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	1005-01-658-6401
Primary Part Number	46121
Item Name	Barrel,machine Gun
FSC / FSG	1005 / 10 — No Item Name Available
Manufacturer	Fn America Llc Div Columbia, Sc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
HAZMAT	No

⇄ Verified Substitutes 8

1315-00-028-4838 INTERCHANGEABLE

Cartridge,105 Millimeter

5120-00-967-202546121 INTERCHANGEABLE

Crimping Tool,terminal,hand

Te Connectivity Corporation

4820-01-146-81974612-1 INTERCHANGEABLE

Valve,relief,pressure and Temper

Pneudraulics, Inc.

3040-01-291-526646121 INTERCHANGEABLE

Shaft,straight

Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division

7520-01-316-28551600-3 INTERCHANGEABLE

Tray,desk

Rubbermaid Office Products Group Inc

5340-01-436-4830 INTERCHANGEABLE

Cover,protective,dust and Moistu

3770-01-584-509446121 INTERCHANGEABLE

Pick,hoof

Vettec Hoof Care Products

7010-01-656-221116011A1001-0 INTERCHANGEABLE

Computer System,digital

Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service

Cross-Reference Index

Part Number	Manufacturer
46121 PRIMARY	Fn America Llc Div Columbia, Sc (USA)

Related Parts

1315-00-028-4838INTERCHANGEABLE

CARTRIDGE,105 MILLIMETER

5120-00-967-2025INTERCHANGEABLE

CRIMPING TOOL,TERMINAL,HAND

46121

4820-01-146-8197INTERCHANGEABLE

VALVE,RELIEF,PRESSURE AND TEMPER

4612-1

3040-01-291-5266INTERCHANGEABLE

SHAFT,STRAIGHT

46121

7520-01-316-2855INTERCHANGEABLE

TRAY,DESK

1600-3

5340-01-436-4830INTERCHANGEABLE

COVER,PROTECTIVE,DUST AND MOISTU

3770-01-584-5094INTERCHANGEABLE

PICK,HOOF

46121

7010-01-656-2211INTERCHANGEABLE

COMPUTER SYSTEM,DIGITAL

16011A1001-0

Frequently Asked Questions

What is NSN 1005-01-658-6401?

NSN 1005-01-658-6401 is a Barrel,machine Gun, manufactured by Fn America Llc Div Columbia, Sc, classified under FSC 1005 (No Item Name Available). Status: active.

What are the part numbers for NSN 1005-01-658-6401?

NSN 1005-01-658-6401 has 1 cross-referenced part number: 46121 (Fn America Llc Div Columbia, Sc).

What NSN replaces 1005-01-658-6401?

There are 8 known substitutes for 1005-01-658-6401: 1315-00-028-4838, 5120-00-967-2025, 4820-01-146-8197 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 46121?

Key specifications for 46121: Part Name Assigned by Controlling Agency: MK46 MOD 1 BARREL WITH HANDLE; Special Features: MK46 MOD 1 BARREL WITH HANDLE. USED ON MK46 MOD 1.NSN 1005-01-534-3682.; End Item Identification: MK46 MOD 1. 3 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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