11.5 inch M4 Barrel - 1:7 NATO - Nitride

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$189.00 - $349.00


All configuration are in stock now.. except "non-F" FSB models, which are currently backordered.. due to shortage of non-F FSB nationally. All other configurations shipping immediately.



Standard 11.5 inch M4 Barrel configuration as used on Colt Commando Carbines, XM177E2, GAU-5.. or any "11.5 inch'ish" builds.

Some prefer the 11.5" over the 10.3"/10.5" on the MK18 due to increased dwell time and velocity. Also that extra inch reduces your "Port Pop" by almost 2,000 psi.


Why choose this barrel?

  • 10.5 and 11.5 are the two most Popular length for Pistol or SBR builds today
  • Nitride Finish - More barrel life and corrosion protection
  • Light Weight: 1.2 lbs


We offer this barrel in three levels of Assembly:


  • Stripped Barrel (just the barrel)
  • "F" or "non-F" FSB, no other parts (see Notes below on "Short Pinning")
  • Full Barrel Assembly
    • Tapper Pinned FSB - choice of "F-marked" or "non-F"
    • Delta Ring or Slip Ring
    • Barrel Nut
    • Sight Post Assembly, Round or Square Post
    • Gas Tube
    • Sling Swivel Assembly


- If you order a "Non-F" FSB, we will configure the barrel with a Slip Ring and Round Front Sight Post

- If you order a "F" marked FSB, we will include a Delta Ring and Square Front Sight Post

- If you would like some other combination just let us know in the "Comments Section" at Check-Out



Barrel Specs:

  • 11.5 inches
  • 5.56 NATO chamber
  • 1:7 twist
  • 4150 Steel Barrel
  • Nitride Finish
  • .750 (M4 profile)
  • 1lbs 4oz


Barrel Assembly Specs:

  • "F" or "non-F" Front Sight Base (Tapper pinned)
  • Slip Ring or Delta Ring
  • Barrel Nut, Spring and Clip
  • Sling Swivel
  • Round or Square Front Sight Post
  • Gas Tube


 All Parts Made in the USA

 Lifetime Guarantee


 * Note on Short Pinning:

 If all you want is a Barrel with a Front Sight Base and nothing else (Option 2) we will assume you are using a different type of Barrel Nut. We will then complete 99% of the Tapper Pin job and not pound the two Tapper Pins in tight so you can slide on your Barrel Nut. Once assembled, simply pound your two Tapper Pins in tight and you are done. We have done all the Tapper Pin work for you - you just need to do the last 1% of the job and tighten the pins down.


 * Note on Full Assembly:

 Everything is assembled and tightened to spec. Simply screw the barrel nut to your receiver, install your Gas Tube and you are Good-To-Go.