WarBlock Barrel Builder

Rated 4.75 out of 5 based on 4 customer ratings
(7 customer reviews)


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All of us want something different for a specific build we have in mind. The Barrel builder Web app allows you to pick and choose what components you want to include on your built-to-order barrel assembly and none of the ones you don’t. This can save you time, headache, and money when forced to remove parts you don’t want from a cookie cutter pre-built barrel assembly. The barrel builder also give you a visual representation of what your assembly will look like. Please choose your desired gas system length and click the “build your own” button to enter the barrel builder.

7 reviews for WarBlock Barrel Builder

  1. Rated 5 out of 5

    Bruce (verified owner)

    I recently received the WarBlock pinned to the 16″ CMMG 5.56 barrel, and I felt the need to post my initial impressions. Wow! I already knew the CMMG barrel was good, but the WarBlock in person just blew me away. I’m one of those fussy engineers, and I do some machining on the side. The quality of the machining on the WarBlock is phenomenal! It’s at the top end of the scale for engineering and machining. It’s one of the rare products that sets the bar a little higher. I catch myself thinking of the WarBlock more as a work of art, but it’s a very functional work of art. It’s very rare to see this much 3D surface contouring on any machined part, outside of $40,000 injection molds. The nitride on the WarBlock perfectly matches the nitride finish on the barrel. It’s just gorgeous.

    I recently watched a 1000 round torture test of the new CMMG MK47, and it failed at the halfway point because the barrel heated to over 500 degrees Fahrenheit, causing the thread locking compound on the gas block set screw to fail. I don’t plan on ever trying to rapid fire 1000 rounds, but there is ZERO CHANCE the WarBlock will slip on my new AR, because War Machine LLC has pinned the WarBlock in place. It’s not going anywhere! Pinning the gas block is a much more labor intensive process, but this is the level of workmanship that you can expect from War Machine LLC, where perfect is good enough!

    I’ll write a follow-up review once my AR build is finished and I’ve had the opportunity to break it in at the range, but I can already tell that the WarBlock is well worth the money I paid. I’m beyond completely satisfied. I’m completely blown away!

  2. Angel

    All I can say is War Machine gas blocks are amazing quality!! I purchased a gas block and sent my virgin barrel in to be pinned. I received in with in two days. I will be purchasing again in the future. Very satisfied!!

  3. Rated 5 out of 5

    Todd (verified owner)

    I worked with War machine in obtaining the 20″ pinned barrel which wasn’t available at the time. He promptly made it available and was EXTREMELY responsive, helpful, informative, and professional in my dealing with him over a course of many days. THIS IS HOW SUCCESSFUL BUSINESSES ARE RUN.

    Now to the product. received it today and it is absolutely beautiful. Perfect pinning job, great looking and functional war block up front, and well packaged. Some of the best service I have received in the firearms industry. Bar none. This is my go-to place for new barrels for my builds.


  4. Bruce

    I liked the previous Barrel Builder, but this is even better! This is like getting a completely custom upper exactly the way you like it, without the custom price! You also get the unbelievably awesome WarBlock that makes gas blocks look like they’re not even trying and might as well not even bothered to show up for their humiliation.

  5. Rated 5 out of 5

    ccjcc81 (verified owner)

    Sight pinned straight as an arrow. Product arrived 3 business days after I ordered it. Packaged expertly, USPS couldn’t hurt this thing if they tried, and I’m sure they did. Great communication. Couldn’t be more pleased. You are my new barrel guy!

    Thank you for shipping this so fast, and for answering my questions so patiently. I’m really happy with this purchase, I will be shopping with you again soon.

  6. Rated 4 out of 5


    Can I order one with a 16” midlength BCM barrel

    • James Dressman

      James Dressman

      Yes you can send us a BCM barrel for pinning using the “customer supplied barrel” option in the WarBlock Barrel Builder. Unfortunately we are not BCM dealers.

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