Colt 5.56 Enhanced Patrol Rifle Complete Upper Receiver Group - 11.5"

Manufactured by Colt
Manufactured by Colt
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Note: This complete upper has a barrel length less than 16" and is subject to all NFA rules and local regulations.

Living up to Colt’s “Proving Every Round” motto, the M4 Carbine EPR Upper Receiver delivers a compact, tactical firearm capable of handling consistent, heavy-volume use. Created with consistent, tactical use in mind, the Colt Enhanced Patrol Rifle (EPR) Upper is the next step in field-tested patrol rifle components. The LE6933-EPR and R0933-EPR Commando Enhanced Patrol Rifle upper receiver features a full-length Centurion MLOK Handguard, as well as a free-floated barrel. This barrel is the Colt standard 11.5” chrome-lined M4, with an A2 flash hider on the front. With a 1/7 twist Mil-Spec MP-tested barrel, this upper has a direct gas operating system which negates the need for the conventional operating rod and results in overall lighter-weight frame for increased tactical advantage. Suited for the full range of 5.56mm ammunition, the straight-line construction distributes recoil directly into the shoulder, increasing both comfort and handling abilities. A cartridge case deflector enables both right and left handed shooters, and the flash hider reduces flash and dust, while the ejection port cover protects the insides from debris when in storage. The EPR upper field strips without need for additional tools or assistance, and the flat-top receiver allows for easy optic mounting.

  • 11.5-Inch 1/7 twist Mil-Spec chrome lined MP tested barrel
  • Direct gas operating system 
  • Accommodates the full range of 5.56mm ammunition
  • Straight-line construction disperses recoil
  • Cartridge case deflector allows easy operation
  • 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
  • Caliber - 5.56mm
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AssemblyComplete Assemblies
Barrel ContourM4
Barrel Length11.5
Barrel Material41V50 Chrome Moly Vanadium Steel
Caliber Gauge5.56 NATO
Gas System LengthCarbine
Gas System TypeDirect Impingement
Handguard11 in M-LOK Rail
Muzzle DeviceA2 Flash Hider
Twist Rate1:7

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