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    • 2019
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  • Rifles (5.56×45 / .223)
    • AR15A2
      • AR15A2 Sporter HBAR
        • R6600K
    • AR15A4
    • Arms Unlimited MK12 HBAR Semi-Auto 18″ Special Purpose Rifle
      • Colt / Arms Unlimited MK 12 HBAR LE Rifle History
    • Colt Accurized Rifle
      • CR6720
      • CR6724 Free=Float Tube
      • CR6724 Troy Rail
    • Colt R0750 Light Machine Gun (LMG) / Light Automatic Rifle
    • Match Target Series
      • MT6601 Match Target Match HBAR
    • SP1 Rifle 1968-1969
    • R6601DH Match Delta HBAR
    • R6700CH ‘Range Select’
    • R6701 Competition HBAR Custom Shop Limited Edition
    • TE6700 Match Target Tactical Elite
    • Colt President Gary French AR-15A2 Delta HBAR
  • Rifle (7.62×39)
    • CK-901 (Yemen)
  • Carbine (9×19)
    • R6430 9mm Sporter Lightweight
  • Carbine (7.62×51)
    • CM762 Modular Carbine
    • LE901 / CM901 Modular Carbine
      • LE901-16S
      • LE901-16SE
      • LE901-16S .308 Carbine San Bernardino PD SWAT Trade-In
  • Carbines (5.56×45 / .223)
    • AR6720 Light Weight Tac Carbine
    • LE6920 Series
      • LE6920-FBP1
      • LE6920-FBP2
      • LE6920 FDEC (Flat Dark Earth Cerakote)
      • LE6920MP (Magpul)
      • LE6920MPS (Magpul Slim Line)
      • LE6920 OEM1
      • LE6920 OEM2
      • LE6920PD
      • LE6920 SOCOM I (2013) (KAC Rail) (Blue Label)
      • LE6920 SOCOM I (2013) (KAC Rail) (White Label)
      • LE6920 SOCOM I (2013) (Troy Rail)
      • LE6920 SOCOM II (2013)
      • LE6920 SOCOM (2017)
      • LEL6920 SOCOM (2018)
      • LE6920-R Trooper M4
    • SP6920 Series
      • SP6920MP-B
      • SP6920 Late Production
    • 6940 Series
      • LE6940
      • LE6940P (Piston Carbine)
      • LE6940 Anodized Flat Dark Earth (FDE)
      • LE6940AE-3G
      • Infantry Automatic Rifle 6940E
      • MT6400R1 (Ban Compliant)
    • LE6960 Combat Unit
    • SCW0921 Sub-Compact Weapon
  • AR-15 Military Classics Series
    • Colt M16A1 Reissue CRM16A1
    • Colt XM177E2 Reissue CRXM177E2
    • Colt Model 02 / 602 Reissue
  • Colt ‘CR’ Firearm Series
    • Colt Carbine Model No. CR6920
    • Colt CR6762 7.62x39mm Carbine
    • CR6920-EPR
    • CR6920MPS-B
    • CR6940
    • CR6960
    • CR6700A4 Rifle
  • Colt CR6920-EC (European Carbine)
  • Mexico Government Return Rifles
    • LE6920M Standard w/Carry Handle
  • Colt M203 Grenade Launcher
  • Z-COTE Limited Edition
  • Expanse M4 Series
    • CE2000 Expanse M4+ Carbine
    • CE2000 Expanse M4 Carbine
    • CE1000 Expanse M4 Carbine
  • Colt Walther .22LR Tactical Rimfire Series
    • Colt M16 .22LR (no data yet)
    • Colt M16 SPR .22LR
    • Colt M4 Ops .22LR (no data yet)
    • Colt M4 .22LR (no data yet)
  • Prototype/Testing Designs
    • Colt India MCAR Program
      • India MCAR Test Upper Receiver 5.56mm
      • India MCAR Test Upper Receiver 7.62×39
    • LE6920 DLAWTRI
    • USMC IAR Program
      • IAR Standard
      • IAR Heavy
    • SCAR Program
      • SCAR Type A
      • SCAR Type B
      • SCAR Type C
    • RO923I/RO923I762 Rifle Set
    • Corrosion Testing Upper Receivers
    • Colt Prototype SP901/LE901 .308 Upper Receiver
  • Optics and Optic Mounts
    • Colt Competition 1″ Scope Mount
    • Colt Industries 3x Scope
    • Colt Scout Red Dot Sight by C-MORE Systems
    • Colt-Branded A.R.M.S. #05 Multi-Base Mount
  • Factory Conversion Kits
    • Arms Unlimited Colt MK12 HBAR 18″ Upper Receiver Assembly
    • LE6920SCMCK SOCOM
      • LE6920SCMCK- KAC M4 RAS/Removable Carry Handle
      • LE6920SCMCK- Troy Rail/Matech 600M Sight
    • LE6940CK Upper Receiver Conversion Kit
  • Factory Accessories, Parts and Individual Lower Receivers
    • Arms Unlimited LE6940P Piston Carbine Lower Receiver
    • Brownells LE6920 M4 Carbine Lower Receivers
    • Colt Tritium Night Sight
    • Colt Blank Adapter
    • Colt Sporter Cheekpiece PN: CA10026
    • Colt Sporter Leather Sling PN: CA10054
    • Match Target Lower Receiver Parts Kit
    • Upgrade Trigger Kit SPK94774
    • .223 4-Position Sliding Buttstock Assembly SPK94769
  • Colt AR-15/M-16 Bayonets
    • Eickhorn W. Germany Manufactured
  • Part Variations
    • Buffers
      • H2 Buffer
      • H3 Buffer
    • Handguards
      • “Y” Foreign Contract Hand Guards
    • Flash Hiders
    • Front Sights
    • Magazine Catch
    • Rear Sights
    • Stocks
      • A1 Fixed Stock
      • A2/A4 Fixed Stock
      • AR-15 Collapsible Stock (MFR #SP64243)
      • ‘CS’ Stock
      • Colt Defense Rogers Super Stoc
      • India Multi-Caliber Assault Rifle (MCAR) Collapsible, Folding Stock
      • “N” Collapsible Stock
      • Sub-Compact Weapon (SCW) Stock
      • Ti-7 SOPMOD Stock
    • Upper Receiver
  • Magazines
    • Colt Competition 30-Round Magazine
    • 5.56 20-Round Magazine, 1983 Military Packaging
    • 5.56 20-Round Magazine 2013 Retail Package
    • 5.56mm 20-Round PreBan Magazine
    • 5.56 30-Round Mil-Spec Aluminum Magazine
    • 7.62×39 5-Round Magazine
    • 30-Round Magazine
    • Cut-Away Armorer Display Magazine
    • 1966 Colt Military 20-Round Magazine 4-Pack
  • Manuals
    • AR-15 Comanche Operation and Maintenance Manual
    • 2010 SCW0921 Sub-Compact Weapon
  • Colt Licensed Accessories (Firearm cases, cleaning kits, range bags, etc.)
    • Rifle Case (Bob Allen) 1984
    • Colt Grip Laser (CGL)
  • Books/Magazine Articles
    • 1964 December Shooting Times Colt Sporter Article
    • 1967 October Popular Mechanics Article M16
    • Colt LE901-16S G&A Oct 2012 Article
    • Colt LE901-16S ‘Rifle Shooter’ 2013 Article
  • Advertising/Promotional Material
    • 1966 Colt’s Military Weapons
    • Colt Crew Served Weapons
    • 1968 Colts Firearms Factory Sticker
    • 1976 – 1979 M16 Rifle Line Rehabilitation
    • Colt Armalite Combat Firepower
    • 1984 Colt M16A2 Carbine One-Sheet
    • 1985 Colt M16A2 One Sheet
    • 1985 Colt 9mm SMG One-Sheet
    • Colt 1987 M16A2 Product Trifold
    • 1987 AR-15A2 Gov’t Model New Product Press Release
    • 1988 Colt Industries ‘The Colt M16A2 Accessories’
    • 1988 Colt M203 Grenade Launcher
    • 1999 Law Enforcement Data Sheets
    • Colt AR-15 Conversion Kit Caliber .22 Long Rifle Fact Sheet
    • Colt ACR Fact Sheet
    • Colt Defense Poster- 2008
    • Colt Defence LE6940_LEC
    • Colt Defense LLC M4 Carbine Coin
    • Colt Defense 3×4 Flag
    • Colt 7.62×39 Sporter Lightweight Rifle Advertising One-Sheet
    • Colt M16A2, M4 Carbine, and M203 Poster
    • Model R-6000 Security Equipment Advertisement
    • Model 6001 Semi-Auto Carbine Advertisement
    • 2004 AUSA M4 Carbine Coin
    • 2009 Colt Grip Laser (CGL) Promotional Image
    • 2011 Shot Show Poker Chip
    • AR-15 Certified Armorer Coins
    • 50th Anniversary of the M16
    • Colt Firearm Transaction Log
    • LE6940 Pin
    • Colt H-Bar Hat
    • 2019 Retail Catalog
    • 2020 International Mil/LE Trifold
    • Colt 2022 Commercial Products
    • Colt 2022 International Military & LE Catalog
  • Catalogs
    • 1964 Dealer Catalog
    • 1965 Product Trifold
    • 1966 Catalog w/Price List
    • 1973 Colt’s Firearms Wholesale Buying Guide
    • 1986 ‘150th Anniversary’ Catalog & Documents
    • 1993 New Products Tri-Fold
    • 2007 Retail Catalog & Price Listing
    • 2009 Catalog
    • 2013 Rifle Catalog
    • 2013 Military Rifle and Carbine Catalog
    • 2015 Colt Competition
    • 2017 Military & Law Enforcement Catalog
    • 2023 Commercial Products Catalog
    • 2023 International Military & Law Enforcement Catalog
  • Colt Roll Die’s
    • Lower Receiver Marking Roll Die
    • AR-15 Roll Die
    • AR-15 Property U.S. Government Roll Die
    • M16 Roll Die
    • M16A1 Roll Die
    • Rampant Colt Roll Die
  • Report Of The M16 Rifle Review Panel 1 JUN 1968
  • Colt AR Related Videos
  • Colt Ammunition
    • Colt Hunting & Defense by Black Hills
  • Colt SCAR-B Clone Project
  • Colt Competition
    • Colt Competition 9mm Carbine

The Colt AR-15 Resource

"A site dedicated to the history of the Colt AR-15 rifles, carbines and associated items"
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  • Home
  • About
  • Colt.com Product Tracker
    • 2019
    • 2020
  • Rifles (5.56×45 / .223)
    • AR15A2
      • AR15A2 Sporter HBAR
        • R6600K
    • AR15A4
    • Arms Unlimited MK12 HBAR Semi-Auto 18″ Special Purpose Rifle
      • Colt / Arms Unlimited MK 12 HBAR LE Rifle History
    • Colt Accurized Rifle
      • CR6720
      • CR6724 Free=Float Tube
      • CR6724 Troy Rail
    • Colt R0750 Light Machine Gun (LMG) / Light Automatic Rifle
    • Match Target Series
      • MT6601 Match Target Match HBAR
    • SP1 Rifle 1968-1969
    • R6601DH Match Delta HBAR
    • R6700CH ‘Range Select’
    • R6701 Competition HBAR Custom Shop Limited Edition
    • TE6700 Match Target Tactical Elite
    • Colt President Gary French AR-15A2 Delta HBAR
  • Rifle (7.62×39)
    • CK-901 (Yemen)
  • Carbine (9×19)
    • R6430 9mm Sporter Lightweight
  • Carbine (7.62×51)
    • CM762 Modular Carbine
    • LE901 / CM901 Modular Carbine
      • LE901-16S
      • LE901-16SE
      • LE901-16S .308 Carbine San Bernardino PD SWAT Trade-In
  • Carbines (5.56×45 / .223)
    • AR6720 Light Weight Tac Carbine
    • LE6920 Series
      • LE6920-FBP1
      • LE6920-FBP2
      • LE6920 FDEC (Flat Dark Earth Cerakote)
      • LE6920MP (Magpul)
      • LE6920MPS (Magpul Slim Line)
      • LE6920 OEM1
      • LE6920 OEM2
      • LE6920PD
      • LE6920 SOCOM I (2013) (KAC Rail) (Blue Label)
      • LE6920 SOCOM I (2013) (KAC Rail) (White Label)
      • LE6920 SOCOM I (2013) (Troy Rail)
      • LE6920 SOCOM II (2013)
      • LE6920 SOCOM (2017)
      • LEL6920 SOCOM (2018)
      • LE6920-R Trooper M4
    • SP6920 Series
      • SP6920MP-B
      • SP6920 Late Production
    • 6940 Series
      • LE6940
      • LE6940P (Piston Carbine)
      • LE6940 Anodized Flat Dark Earth (FDE)
      • LE6940AE-3G
      • Infantry Automatic Rifle 6940E
      • MT6400R1 (Ban Compliant)
    • LE6960 Combat Unit
    • SCW0921 Sub-Compact Weapon
  • AR-15 Military Classics Series
    • Colt M16A1 Reissue CRM16A1
    • Colt XM177E2 Reissue CRXM177E2
    • Colt Model 02 / 602 Reissue
  • Colt ‘CR’ Firearm Series
    • Colt Carbine Model No. CR6920
    • Colt CR6762 7.62x39mm Carbine
    • CR6920-EPR
    • CR6920MPS-B
    • CR6940
    • CR6960
    • CR6700A4 Rifle
  • Colt CR6920-EC (European Carbine)
  • Mexico Government Return Rifles
    • LE6920M Standard w/Carry Handle
  • Colt M203 Grenade Launcher
  • Z-COTE Limited Edition
  • Expanse M4 Series
    • CE2000 Expanse M4+ Carbine
    • CE2000 Expanse M4 Carbine
    • CE1000 Expanse M4 Carbine
  • Colt Walther .22LR Tactical Rimfire Series
    • Colt M16 .22LR (no data yet)
    • Colt M16 SPR .22LR
    • Colt M4 Ops .22LR (no data yet)
    • Colt M4 .22LR (no data yet)
  • Prototype/Testing Designs
    • Colt India MCAR Program
      • India MCAR Test Upper Receiver 5.56mm
      • India MCAR Test Upper Receiver 7.62×39
    • LE6920 DLAWTRI
    • USMC IAR Program
      • IAR Standard
      • IAR Heavy
    • SCAR Program
      • SCAR Type A
      • SCAR Type B
      • SCAR Type C
    • RO923I/RO923I762 Rifle Set
    • Corrosion Testing Upper Receivers
    • Colt Prototype SP901/LE901 .308 Upper Receiver
  • Optics and Optic Mounts
    • Colt Competition 1″ Scope Mount
    • Colt Industries 3x Scope
    • Colt Scout Red Dot Sight by C-MORE Systems
    • Colt-Branded A.R.M.S. #05 Multi-Base Mount
  • Factory Conversion Kits
    • Arms Unlimited Colt MK12 HBAR 18″ Upper Receiver Assembly
    • LE6920SCMCK SOCOM
      • LE6920SCMCK- KAC M4 RAS/Removable Carry Handle
      • LE6920SCMCK- Troy Rail/Matech 600M Sight
    • LE6940CK Upper Receiver Conversion Kit
  • Factory Accessories, Parts and Individual Lower Receivers
    • Arms Unlimited LE6940P Piston Carbine Lower Receiver
    • Brownells LE6920 M4 Carbine Lower Receivers
    • Colt Tritium Night Sight
    • Colt Blank Adapter
    • Colt Sporter Cheekpiece PN: CA10026
    • Colt Sporter Leather Sling PN: CA10054
    • Match Target Lower Receiver Parts Kit
    • Upgrade Trigger Kit SPK94774
    • .223 4-Position Sliding Buttstock Assembly SPK94769
  • Colt AR-15/M-16 Bayonets
    • Eickhorn W. Germany Manufactured
  • Part Variations
    • Buffers
      • H2 Buffer
      • H3 Buffer
    • Handguards
      • “Y” Foreign Contract Hand Guards
    • Flash Hiders
    • Front Sights
    • Magazine Catch
    • Rear Sights
    • Stocks
      • A1 Fixed Stock
      • A2/A4 Fixed Stock
      • AR-15 Collapsible Stock (MFR #SP64243)
      • ‘CS’ Stock
      • Colt Defense Rogers Super Stoc
      • India Multi-Caliber Assault Rifle (MCAR) Collapsible, Folding Stock
      • “N” Collapsible Stock
      • Sub-Compact Weapon (SCW) Stock
      • Ti-7 SOPMOD Stock
    • Upper Receiver
  • Magazines
    • Colt Competition 30-Round Magazine
    • 5.56 20-Round Magazine, 1983 Military Packaging
    • 5.56 20-Round Magazine 2013 Retail Package
    • 5.56mm 20-Round PreBan Magazine
    • 5.56 30-Round Mil-Spec Aluminum Magazine
    • 7.62×39 5-Round Magazine
    • 30-Round Magazine
    • Cut-Away Armorer Display Magazine
    • 1966 Colt Military 20-Round Magazine 4-Pack
  • Manuals
    • AR-15 Comanche Operation and Maintenance Manual
    • 2010 SCW0921 Sub-Compact Weapon
  • Colt Licensed Accessories (Firearm cases, cleaning kits, range bags, etc.)
    • Rifle Case (Bob Allen) 1984
    • Colt Grip Laser (CGL)
  • Books/Magazine Articles
    • 1964 December Shooting Times Colt Sporter Article
    • 1967 October Popular Mechanics Article M16
    • Colt LE901-16S G&A Oct 2012 Article
    • Colt LE901-16S ‘Rifle Shooter’ 2013 Article
  • Advertising/Promotional Material
    • 1966 Colt’s Military Weapons
    • Colt Crew Served Weapons
    • 1968 Colts Firearms Factory Sticker
    • 1976 – 1979 M16 Rifle Line Rehabilitation
    • Colt Armalite Combat Firepower
    • 1984 Colt M16A2 Carbine One-Sheet
    • 1985 Colt M16A2 One Sheet
    • 1985 Colt 9mm SMG One-Sheet
    • Colt 1987 M16A2 Product Trifold
    • 1987 AR-15A2 Gov’t Model New Product Press Release
    • 1988 Colt Industries ‘The Colt M16A2 Accessories’
    • 1988 Colt M203 Grenade Launcher
    • 1999 Law Enforcement Data Sheets
    • Colt AR-15 Conversion Kit Caliber .22 Long Rifle Fact Sheet
    • Colt ACR Fact Sheet
    • Colt Defense Poster- 2008
    • Colt Defence LE6940_LEC
    • Colt Defense LLC M4 Carbine Coin
    • Colt Defense 3×4 Flag
    • Colt 7.62×39 Sporter Lightweight Rifle Advertising One-Sheet
    • Colt M16A2, M4 Carbine, and M203 Poster
    • Model R-6000 Security Equipment Advertisement
    • Model 6001 Semi-Auto Carbine Advertisement
    • 2004 AUSA M4 Carbine Coin
    • 2009 Colt Grip Laser (CGL) Promotional Image
    • 2011 Shot Show Poker Chip
    • AR-15 Certified Armorer Coins
    • 50th Anniversary of the M16
    • Colt Firearm Transaction Log
    • LE6940 Pin
    • Colt H-Bar Hat
    • 2019 Retail Catalog
    • 2020 International Mil/LE Trifold
    • Colt 2022 Commercial Products
    • Colt 2022 International Military & LE Catalog
  • Catalogs
    • 1964 Dealer Catalog
    • 1965 Product Trifold
    • 1966 Catalog w/Price List
    • 1973 Colt’s Firearms Wholesale Buying Guide
    • 1986 ‘150th Anniversary’ Catalog & Documents
    • 1993 New Products Tri-Fold
    • 2007 Retail Catalog & Price Listing
    • 2009 Catalog
    • 2013 Rifle Catalog
    • 2013 Military Rifle and Carbine Catalog
    • 2015 Colt Competition
    • 2017 Military & Law Enforcement Catalog
    • 2023 Commercial Products Catalog
    • 2023 International Military & Law Enforcement Catalog
  • Colt Roll Die’s
    • Lower Receiver Marking Roll Die
    • AR-15 Roll Die
    • AR-15 Property U.S. Government Roll Die
    • M16 Roll Die
    • M16A1 Roll Die
    • Rampant Colt Roll Die
  • Report Of The M16 Rifle Review Panel 1 JUN 1968
  • Colt AR Related Videos
  • Colt Ammunition
    • Colt Hunting & Defense by Black Hills
  • Colt SCAR-B Clone Project
  • Colt Competition
    • Colt Competition 9mm Carbine

LE6940CK Upper Receiver Conversion Kit

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Links

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https://www.colt.com/

Colt on Instagram:

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Colt on Facebook:

https://www.facebook.com/ColtFirearms/

Colt on YouTube:

https://www.youtube.com/channel/UCtBRm4pLQKf2vvk13rdYnng

Colt Collectors Association on the Internet:

http://www.coltcollectors.com/

Colt Collectors Association on Facebook:

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Websites of Interest:

https://www.coltfirearmscollector.com

https://www.coltforum.com/

http://www.retroblackrifle.com

Colt SP1 Data

https://www.ar15.com/forums/ar-15/-/123-304266/?fbclid=IwAR0OKKokNEv2eX3Npab-uTNHKCd-994Tzzl9tSG-noBjymEGknOtq26eBxg

https://www.ar15.com/

https://www.m4carbine.net/

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Back: Colt AR15A4 20″ Rifle Front: AR6720 AR15A4 Lightweight LE Carbine
From Top to Bottom: LE6940, AR15A4, LE901-16S, LE6920, LE6920
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