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Stern 9mm barrels are ideal for gun lovers who want to build their own custom dedicated 9mm  AR15 upper group. Our barrels offer an advantage over the competition.  Every stern defense barrel throat is machined deeper for a longer free bore to accommodate bullets with a longer ogive.  We have found that some common defense rounds jam into the rifling before the round is fully chambered. Some of the barrels on the market do not accommodate this and will potentially result in nasty malfunctions, resulting in a round being stuck in the chamber requiring manual methods to clear the malfunction.

Note: Barrel comes with locating pin installed.


  • Barrel length is measured in overall length from breech to muzzle.
  • Caliber: 9mm.
  • Length: 10.5 Inches.
  • Made in the U.S.A.
  • Threaded .5-36.
  • 1:10 TWIST.
  • 4150 Chrome-moly steel.
  • Melonite coating.



2 Reviews Hide Reviews Show Reviews

  • 5
    Best AR9 barrel for your pcc

    Posted by Mr. B on Feb 24th 2022

    5 star. Highly recommended! Most of my Teammates used this barrel, most of them change their expensive barrel to 10.5 stern defense barrel.

  • 4
    Awesome barrel but...

    Posted by Wil on Oct 2nd 2019

    Only thing that is wrong with this product is that it isnt DOLOs quick detach compatible. I had to add a shim to the barrel collar, on the barrel end side. But after that, it works amazingly and would highly recommend this barrel