5KU 14.5" Aluminium Outer Barrel For M4/AR15 AEG

Code: 5KU-126
  • Aluminium construction
  • 14.5" Heavy profile barrel - 14mm CCW male threads
  • Compatible with M4/AR15 AEG rifles

If you are building an M4 from the ground up or you want a new look for your M4/AR15 platform this 5KU Aluminium outer barrel is worth a look! This barrel is 14.5 inches in length, just like the standard carbine length M4 barrel but has a heavier profile towards the tip to simulate real-world heavy barrels which allow for more sustained fire before accuracy takes a dive due to heat build-up.

The barrel is constructed from two parts, the barrel itself and the barrel base which are secured together using a pair of steel grub screws. At the tip we have the Airsoft standard 14mm CCW male threading, leaving you with a wealth of options for what muzzle device you choose to mount. The profile of the barrel matches real M4 barrels throughout its length, making this a great choice as a replacement for those who don't like seeing what is clearly a skinny Airsoft barrel through the ports on their handguard. This barrel is designed for M4/AR15 AEGs and should fit the vast majority of them.

Full description



  • Aluminium construction
  • 14mm CCW male threading - Ready for tracer/suppressor
  • Heavy barrel profile - Thicker towards the tip, no M203 cut-out
  • Two-piece design - Barrel secured to the base via 2 grub screws
  • Includes mounting holes for M4/AR15 triangular front sight
  • Compatible with M4/AR15 AEG rifles

Package Includes

  • 5KU 14.5" Aluminium Outer Barrel For M4/AR15 AEG



Parts & Accessories Type
External Parts
External Part Type
Outer Barrel
Package Includes
Metal outer barrel
Patrol Base - Warning Icon
Patrol Base - Warning Icon
Parts Fitting


Colour Wheel Greyscale
Item Colour
Construction Icon
Aluminium with steel grub screws

Weight and Dimension

Product Length
Approx. 38.3cm
Weight KG Icon
Weight (KG)
Approx. 0.185kg

Part Specific

Weapon Platform
AR, M4 / AR-15 / M16, Assault Rifle,

Suppressor Specific

Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Icon Thread Type
Outer Barrel Thread Type