OE-SPEC 9MM 4" AR-15 Barrel- Nitride

(7 reviews)
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Out of stock

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VALUE-LINE 9MM 4.0" AR15 Barrel

• Chamber- 9MM

• Length- 4" (3.5" when compared to a standard AR15 barrel for handguard measurements)

• Threads- 1/2-36

• Finish- Nitride 

• Twist- 1:10

• Material- 41V50 Chrome Moly Vanadium

• Marked for Caliber and Twist

• Weight- 9.41 OZ

• Fully Made In House From KAK Industry Produced Blanks

Tapered Profile 

As a high volume contract manufacturer for the firearms industry, KAK is able to leverage its machining capacity to bring the same quality parts that we provide to some of the biggest names in the industry, straight to the retail customer.  We manufacture our barrels from the raw material all the way to the complete product, all under our own roof.  Our barrels are fully inspected through the entire process, including air-gauging the bores, physical measurements of the threads and outer diameters, and 100% gauging of the headspace tolerance.  Our OE-Spec line provides you with the quality you demand and the value you desire.


AR15 Pistol Caliber


  • 5
    Happy Happy Joy Joy

    Posted by marvin on July 9, 2020

    Ordered one to try it out. Happy with it. No feed issues on the dedicated AR9 setup using ETS Magazines and promag 50 rd drum. Accurate at 25 yards. Running a Franklin Armory binary trigger, Tulammo steel case ammunition No worries. This barrel is worth the skipping eating out for breakfast for a week. Cheers

  • 5
    9mm Barrel

    Posted by Raymond on March 26, 2020

    Best bang for your buck !!!! Purchased a competitor barrel but feed cone wasn’t to spec . This is definitely a better barrel and with the bcg from kak preforms perfect.

  • 5
    couldn't be beat for the price

    Posted by thomas on October 11, 2019

    Searched for a while for a barrel this short that wasn't pencil thin or bull barrel thick. This fit the bill perfect. Great fit and finish threadsh are great and price was cheapest ANYWHERE! Fast shipping also.

  • 5
    Great barrel!

    Posted by Jerry on May 1, 2018

    Bought as a place holder barrel while I'm waiting on a 3-Lug barrel to be custom made. This little barrel is great. Very accurate with tight groups at 25 yards. Nice looking finish and it's a shame that it's hidden under my hand guard. I did experience feed issues with my gun at first, but it was due to the mag adapter for Colt-style magazines. Once I changed that adapter to a Hahn dedicated adapter, all of those issues disappeared. Fired several magazines without a problem. I would definitely buy again.

  • 5
    Great barrel!

    Posted by edinalaska on April 29, 2017

    250 rounds on the first range trip and no issues. Pretty accurate at 25 yards. Very pleased with this barrel.

  • 5
    Great for the price.

    Posted by Chad on March 15, 2017

    No problems with the barrel, shot about 300 rounds through it the other day. My only complaint is, and maybe this is only a problem with the Glock mag dedicated lowers, is there is not really a feed ramp. The round approaches the barrel at such a steep angle, and since there isn't a gradual feed ramp, the round lodges itself at an angle and won't chamber. If you type in "failure to feed ar9" and look at images, you'll see what I'm talking about. This only happened maybe four times while shooting it so not enough of a problem to give a bad rating, and its more my setup than it is an issue with the barrel.

  • 5
    9mm barrel

    Posted by Gregory on March 2, 2016

    Fast shipping. This barrel has a very nice finish and looks great. No rough edges and very smooth. Threads are excellent. I can't wait to make a new upper with this. The item was on sale and a great value.