Colt 6921-EPR 5.56mm Enhanced Patrol Rifle Upper Receiver Assembly | 14.5" Barrel

$999.00 $880.00
(2 reviews)
Current Stock:
Adding to cart… The item has been added

The Colt LE6921-EPRCK Upper Assembly is used on the LE6921-EPR Enhanced Patrol Rifle. This upper receiver allows for a free-floated barrel and also features a full-length Centurion MLOK Handguard. The barrel is Colt's standard 14.5" chrome lined M4 barrel with an A2 flash hider up front.

Package Contents

  • Colt LE6921-EPR Complete Upper Assembly
  • Complete M4 Full Auto Bolt Carrier Assembly
  • Charging Handle
  • 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
  • Flash Hider


  • 5
    Upper for Colt M4 SBR

    Posted by steve on 13th Jul 2020

    Bought for an SBR Colt M4 lower. Took to range for forst time this weekend, much more accurate than I thought it would be for a 14.5" barrel (only 100yds). No jams, even suppressed. Like the Magpul metal popup sites, and really impressed with free floated barrel with Centurion Arms Mlok handguard. If you want "100% Colt," a great buy. Very impressed.

  • 4

    Posted by Julian on 9th May 2020

    Just received this upper and it is really nice. It is a Colt Cage Code Keyhole Receiver and Cage Code barrel. The Centurion Arms MLok rail uses YFS screws which isn't a big deal but I plan on swapping them out. The finish on the receiver itself looks like Knights Armament did it, there is a purple-ish tint to it and looks like the RAS rail on my issued rifled when I was in the Marines. Their seems to be some sort of issue with the coating itself because it looks like stretching in the coating around the forward-assist. The BCG: the carrier is not C marked, the Bolt is MPC marked with no white-dot. The charging handle has no markings on it either and the barrel, as mentioned, is Cage Code with MP 1/7 marked carbine length and the gas block is a shaved FSP and a standard birdcage. The included Magpul Pro backup iron sights are pretty solid.