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    Finally, an affordable adjustable gas block in 4 sizes: .625", .750", .875", and .936".

    We have a fit for every barrel!

    AT3 is proud to carry adjustable gas blocks from Wojtek Weaponry, giving you an affordable upgrade to your rifle's gas system.  These gas blocks are fully adjustable, regulating the flow of your rifle's gas impingement for improved reliability and longevity.  Whether you're adjusting a new AR pistol to prevent overgassing, or custom tuning a precision rifle's action, these gas blocks will make all the difference in your new build.

    These gas blocks also clamp onto the barrel, improving barrel harmonics and accuracy over gas blocks that use pressure directly on the barrel with pins or set screws.  It is recommended to use a removable threadlocker - such as Blue Loctite - on the set screws that tighten the block around the barrel.  Do not use threadlocker on the adjustment or locking screws.


    • 4 sizes available: .625", .750", .825", and .936 (.750" is the most common size, but always measure the barrel if you aren't sure!)
    • Low profile design, perfect for any free-float handguard
    • Steel construction (better than aluminum for withstanding extreme temperatures)
    • Secured using 3 set screws to clamp the gas block onto the barrel, increasing accuracy over pinned or set screw gas blocks
    • Gas tube roll pin included
    • Compatible with AR15 and AR10 platforms
    • Allen wrenches for attachment, adjustment, and locking set screws are optional but highly recommended.  Sizes as follows: 
      1. Adjustment screw = 5/64" 
      2. Side locking screw = .05"
      3. Attachment screws= 3/32"


      • Material: 1018 Steel, Black Nitride
      • Length: 1"
      • Height: Sits 3/8" off of the barrel (fits under all free float handguards!)
      • Weight: 1.3-1.8oz depending on size
      • Packaging: PE Bag

      Frequently asked questions: 

      Q: How can I tell what size of gas block I need?
      A: The gas block size is based on the outside diameter of your barrel. The most common size is .75" (this is the military standard). If you aren't sure - use calipers to measure  the diameter of the barrel, in the area where the gas block sits. Or alternatively, you can try looking up the make and model of your rifle online for more details. 

      Q: How do I know if this gas block will fit under my handguard? 
      A: These adjustable gas blocks are as small as you will find on the market. They are guaranteed to work with our AT3 handguards, and they should be compatible with all the other handguards out there!

      Have Questions About this Product?

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      Customer Reviews

      Based on 4 reviews
      Well made and great desing.

      Most adjustable blocks are adjusted from the receiver end making it necessary to remove the handguard to make an adjustment. These adjust from the muzzle end. I liked the first one so much, I ordered two more. After I do an inventory of sizes I need, I'll probably order a couple more.

      Thanks for sharing your feedback, William. We're glad you liked it. - AB
      The Best Gas Blocks

      I bought 2 of these Gas Blocks. One Was for a 6.5 Creedmore the other was for a 308 AR10. They worked Great on both guns.
      They were both very easy to install and adjust. The Quality was very good. I started with them closed and opened them in half turns till guns were throwing brass in the 3 Oclock position. I highly recommend these gas blocks and the price is VERY VERY GOOD also.

      Thanks for sharing your experience, Gordon. We're glad you're satisfied with your purchase - AB
      Well made and nice finnish

      I have been looking for a affordable adjustable gas block and I found this one. The way it is made I don't foresee any problem's when I install it. I have a carbine length carbine length hand guard so it will be exposed, the finish is beyond my expectations.

      Nice gas block for the same price as a non-adjustable low-profile gas block! You can't go wrong!

      Thanks for sharing your feedback, Mitch. We're glad you're satisfied with your purchase. - AB
      Great AGB

      Less than half of other AGB. The quality & price are great. Works great, took about 3 1/2 turns out to cycle constantly. Has a set screw that screws into the side of the adjustment screw to lock it in place. Not a big deal if you’re not constantly adjusting it. Very happy!!

      Glad to know it's working well for you, Kyle. We appreciate your feedback! -- LM