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Wojtek Weaponry Adjustable Gas Block - 4 Sizes Available

Wojtek Weaponry Adjustable Gas Block – 4 Sizes Available


MSRP: $44.99


Out Of Stock

90 Day No-Hassle Returns We Pay Return Shipping

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at support@at3tactical.com and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at support@at3tactical.com. We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you’re dissatisfied with your purchase, in any way, please contact us at support@at3tactical.com – we will do our best to make it right.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

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!

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Customer Reviews

Based on 12 reviews
Great, affordable adjustable gas blocks

This is the third time I've bought Wojtek clamp-on adjustable gas blocks. They are inexpensive for the quality they have, and they work great. I've got them on 308 and 300 AAC. They're effective and easy to adjust. Not sure why I would buy anything but these, to be honest.

problem solved

Installed this adjustable block and turned the gas way down so everything cycles and locks just like it should. Long allen wrenches were a great help but would tie a bright colored ribbon on them when doing it the next time. I kept dropping them in the grass and they were hard to find. Would not build another AR without an adjustable block.

Thanks for sharing your feedback, Bill. We're glad you're satisfied with your purchase. Cheers!
uiBest thing since sliced bread!

Have yet to shoot gun I've mounted this AGB on but the mounting was as easy as, shall I say it, falling off a log. Your hole placed at the top of the block, to be able to mount properly is shear genius!
My plan is to put them on all my ARs

Thanks for sharing your feedback, Ronald. We're glad you're satisfied with your purchase. Cheers!
Adj. gas block/mid length tube

Outstanding product!! Fit and finish on both parts is outstanding! Very pleased

Thanks for sharing your feedback, Jimmy. We're so glad you're satisfied with your purchase. Cheers!
Best value

Performs just as good as the more expensive ajustable gas blocks. Will use again on future builds.

Thanks for sharing your feedback. We're so glad you're satisfied with your purchase. Cheers!