Colt 14.5 inch Upper Receiver Assembly

$720.00 $620.00
(32 reviews)
Current Stock:

The Colt LE6921CK Upper Receiver Assembly feature's Colt's upper receiver. In addition to an uninterrupted full-length front rail, this upper receiver allows for a free-floated barrel. This LE6921CK Upper Assembly also features a gas-block mounted fixed front sight post with bayonet lug and a flip-up backup rear sight. The barrel is Colt's standard 14.5" chrome lined M4 barrel with an A2 flash hider up front.


Package Contents

  • Colt LE6921CK Complete Upper Assembly
  • Complete M4 Full Auto Bolt Carrier Assembly
  • Charging Handle
  • Fixed Post Front Sight
  • Folding Rear Sight
  • Manual


  • 14.5 Inch 1/7 twist Mil-Spec chrome lined MP tested barrel
  • Unique direct gas operating system eliminates the conventional operating rod and results in fewer and lighter components
  • Accommodates the full range of 5.56mm ammunition, including the NATO M855/SS109 and U.S. M193, utilizing a rifling twist of 1 turn in 7"
  • Straight-line construction disperses recoil straight back to the shoulder, increasing handling capabilities, especially during repeated fire
  • Cartridge case deflector allows easy operation in both right and left handed shooting positions for increased tactical applications
  • Muzzle compensator further reduces muzzle climb and helps eliminate flash and dust signatures
  • Ejection port cover protects the chamber from dust and mud
  • Field strips easily without special tools for simple field user maintenance
  • Flat top receiver allows for removable carrying handle and easy mounting of accessories
  • High strength materials for greater comfort and effectiveness
  • Caliber - 5.56mm
  • Gas Direct system, Locking bolt
  • Front Sight - Adjustable front
  • Rear Sight - Target sight adjustable for windage and elevation
  • Flash Hider


  • 3
    Colt 14.5 inch Upper Receiver Assembly

    Posted by Butchjones on 8th Feb 2021

    Opened the package and the upper came packed inside a rifle box, no manual, no barrel cap, and a Magpul MBUIS rear sight was included instead of the Matech shown in website photo. $35.00 Magpul sight VS a $ 75.00 MaTech sight, feel like I got molested without a kiss. Update your photo's on your Webpage!

  • 5
    Thanks arms;)

    Posted by Nick on 13th Jan 2021

    Nice fit and finish from colt. Shoots very nice and works perfect for my build. At a much better price than anywhere else.

  • 5
    Great price

    Posted by Robert Broussard on 10th Jan 2021

    As described and a great price.

  • 5
    Colt 14.5 inch Upper

    Posted by Shawn Kinney on 5th Jan 2021

    Great experience, upper was shipped the very next day. Fit and finish are perfect! Great price too!!

  • 5
    Excellent buy

    Posted by JOHN KRZOS on 4th Jan 2021

    Love that its a Colt, Great buy

  • 3
    Colt 14.5 upper disappointment

    Posted by Anthony Horonzy on 4th Jan 2021

    Didn't come with the proper factory box or packaging. I didn't know i was buying a opened box deal. Not sealed in factory plastic with oil

  • 5
    Colt Upper

    Posted by Unknown on 4th Jan 2021

    Great upper, new, still in the factor box and plastic.

  • 5
    Colt 14.5” upper

    Posted by Blake on 4th Jan 2021

    Upper received exactly as described new in wrap.

  • 5
    Colt 14.5 upper

    Posted by That guy on 3rd Jan 2021

    Always great service and great products. I love ordering from these guys