Colt M4 Commando 11.5 inch 5.56mm Heavy Barrel Assembly w/ Low Profile Gas Block

$320.00 $250.00
(16 reviews)
Current Stock:

Factory Colt M4 Commando heavy profile, 11.5 inch, 5.56x45mm NATO, carbine length gas system barrel. Complete barrel assembly features M4 feed ramp, barrel nut, low profile gas block, and is threaded 1/2-28 for your choice of muzzle device.


  • 5
    Colt Barrel 11.5 inch

    Posted by SRL on 6th Jun 2019

    Great barrel, fast shipping

  • 5
    Quick Shipping

    Posted by Sam Sumrall on 5th May 2019

    1/7" twist. Neat offering.

  • 5
    Nice Colt Barrel

    Posted by Eric Bell on 3rd May 2019

    AU shipped the barrel the same day I ordered it. Barrel is perfect. Was the first time I’ve removed a factory gas block/front sight from a Colt barrel and it was NOT phosphate after the pins were drilled. So the underside of the gas block and the tapper pin drilling into the barrel is bare steel. Colt usually does the phosphate coating after all of that so there is no bare steel.

  • 5
    11.5" Perfection

    Posted by curtis mattingly on 30th Apr 2019

    What can I say, from start to finish everything was perfect.. Thanks AU!

  • 5
    Great deal / great product

    Posted by Andrew Johnson on 30th Apr 2019

    Great product, super fast delivery, exactly what I needed. Armsunlimited is my go to for anything and everything and I know I’m going to get an amazing deal without looking around because they’re the best. Always get my orders quick and correct, thanks Armsunlimited!

  • 5
    Colt Barrel

    Posted by Nathan on 30th Apr 2019

    Arrived greased and in the blue bag, a cage coded 11.5” colt commando heavy barrel with a pinned low profile (shaved down fsb) pinned in place and a standard barrel nut. Shipped fast and at a great price seen this same barrel less the gas block and barrel nut for twice the price elsewhere.

  • 5
    Better than expected!

    Posted by Curt on 13th Apr 2019

    Received barrel way faster than expected, and it arrived in perfect condition.. I can't wait to build a pistol with this barrel.. If you get a chance snag one of these up, as I am already trying to resist getting another one for a rainy day!