PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20491Guard,trigger

Charles Reed Knight Jr Dba Knight's Armament Company · NSN 1005-01-601-5586 · FSC 1005 · No Item Name Available
Verified by PartsTable
NSN 1005-01-601-5586 — this item is cataloged by the U.S. Government under National Stock Number 1005-01-601-5586. Primary manufacturer part number: 20491.
Features
  • Guard,trigger — FSC 1005
  • Style Designator: PLAIN ENDS
  • Model Number: M110
  • Weapon for Which Designed: RIFLE
  • Length: 53.2 MILLIMETERS NOMINAL MM
  • Size Designation: 7.62 MILLIMETER MM
  • Material: ALUMINUM ALLOY OR PLASTIC
  • 1 verified cross-reference
Applications
  • Applications requiring Aluminum Alloy or Plastic construction
General Description

The Guard,trigger, cataloged under National Stock Number 1005-01-601-5586, is classified within Federal Supply Class 1005 (No Item Name Available) of the Weapons group. The primary manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1005-01-601-5586
Primary Part Number20491
Item NameGuard,trigger
FSC / FSG1005 / 10 — No Item Name Available
ManufacturerCharles Reed Knight Jr Dba Knight's Armament Company
StatusACTIVE
Style DesignatorPLAIN ENDS
Model NumberM110
Weapon for Which DesignedRIFLE
Length53.2 MILLIMETERS NOMINAL MM
Size Designation7.62 MILLIMETER MM
MaterialALUMINUM ALLOY OR PLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5935-00-221-9212 INTERCHANGEABLE
Connector,plug,electrical
3895-00-718-372358239 INTERCHANGEABLE
Sprinkler Mat Assembly
Dressta North America Ltd
5365-00-996-067920491 INTERCHANGEABLE
Spacer,ring
Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems
5342-01-115-1747 INTERCHANGEABLE
Coupling
5950-01-416-57717137806-0001 INTERCHANGEABLE
Reactor
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5306-01-498-385891264A585 INTERCHANGEABLE
Bolt,internal Wrenching
Mcmaster-Carr Supply Co
Cross-Reference Index
Part NumberManufacturer
20491 PRIMARY Charles Reed Knight Jr Dba Knight's Armament Company (USA)
Related Parts
5935-00-221-9212INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
3895-00-718-3723INTERCHANGEABLE
SPRINKLER MAT ASSEMBLY
58239
5365-00-996-0679INTERCHANGEABLE
SPACER,RING
20491
5342-01-115-1747INTERCHANGEABLE
COUPLING
5950-01-416-5771INTERCHANGEABLE
REACTOR
7137806-0001
5306-01-498-3858INTERCHANGEABLE
BOLT,INTERNAL WRENCHING
91264A585

Frequently Asked Questions

What is NSN 1005-01-601-5586?

NSN 1005-01-601-5586 is a Guard,trigger, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 1005 (No Item Name Available). Status: active.

What are the part numbers for NSN 1005-01-601-5586?

NSN 1005-01-601-5586 has 1 cross-referenced part number: 20491 (Charles Reed Knight Jr Dba Knight's Armament Company).

What NSN replaces 1005-01-601-5586?

There are 6 known substitutes for 1005-01-601-5586: 5935-00-221-9212, 3895-00-718-3723, 5365-00-996-0679 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20491?

Key specifications for 20491: Style Designator: PLAIN ENDS; Model Number: M110; End Item Identification: 7.62 X 51 MM SEMI-AUTOMATIC SNIPER RIFLE M110 MM; Weapon for Which Designed: RIFLE. 8 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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