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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: 16.1 Inches.
  • Made in the U.S.A.
  • Threaded .5-36.
  • 1:10 TWIST.
  • 4150 Chrome-moly steel.
  • Melonite coating.



5 Reviews Hide Reviews Show Reviews

  • 5
    Incredibly Accurate

    Posted by Ernesto on Feb 14th 2022

    Excellent barrel and very accurate! Sub-MOA groups!

  • 5
    Stern quality and value

    Posted by PPCluvr on Aug 23rd 2021

    Typical Stern quality and value. Best blowback barrel.

    If only they’d make a Beretta 84 adapter now!

  • 5
    Awesome accurate Barrel

    Posted by Jean-Luc Calouro on Sep 20th 2019

    Very well made barrel, I borescoped before hitting the range the first time. The bore flawless. Very pleased.

  • 5
    9 mm PCC build

    Posted by William on Sep 8th 2019

    After my research I bought the Stern Defense barrel, bolt and Glock mag adapter for this 16" carbine upper build. Using third generation Glock mags and a 5.1 oz buffer the carbine performed and cycled flawlessly. The buffer is to light so a heavier buffer will be used. Very pleased with results.

  • 5
    16" 9mm barrel

    Posted by Michael Roll on Apr 11th 2019

    The out of the box accuracy of this barrel is fantastic.