Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available
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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 over-gassing, 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 thread locker – such as Blue Loctite – on the set screws that tighten the block around the barrel. Do not use thread locker on the adjustment or locking screws.
Features:
- 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:
- Adjustment screw = 5/64″
- Side locking screw = .05″
- Attachment screws= 3/32″
Specifications:
- 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!
All 8 options on this page
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .750" Adjustable Gas Block, Allen Wrenches: Yes (Add $2.50) | SKU: wojtek-agb-750-w-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .750" Adjustable Gas Block, Allen Wrenches: No | SKU: wojtek-agb-750-no-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .625" Adjustable Gas Block, Allen Wrenches: Yes (Add $2.50) | SKU: wojtek-agb-625-w-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .625" Adjustable Gas Block, Allen Wrenches: No | SKU: wojtek-agb-625-no-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .875" Adjustable Gas Block, Allen Wrenches: Yes (Add $2.50) | SKU: wojtek-agb-875-w-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .875" Adjustable Gas Block, Allen Wrenches: No | SKU: wojtek-agb-875-no-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .936" Adjustable Gas Block, Allen Wrenches: Yes (Add $2.50) | SKU: wojtek-agb-936-w-tools
- Adjustable AR-15/AR-10 Gas Block by Wojtek Weaponry – 4 Sizes Available - Gas Block Size: .936" Adjustable Gas Block, Allen Wrenches: No | SKU: wojtek-agb-936-no-tools
Customer reviews 56
AT3 Tactical · Thank you for your feedback on our Adjustable AR15/AR10 Gas Block. We apologize for any inconvenience you experienced with the smaller port size. Our gas block is designed to provide precise gas flow control for optimal performance, but we understand that it may not be suitable for all rifle setups. If you would like to discuss further options for your .300 BLK pistol, please don't hesitate to reach out to our customer service team. We are always happy to help find the best solution for your needs.
AT3 Tactical · Thank you for your review! We're glad to hear you're happy with the product and the company.
AT3 Tactical · Thanks for the review! We're glad to have you as a customer.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
Questions & Answers
No questions yet. Ask about fit, install or compatibility and our team answers within a business day.
Warranty & returns
Backed by the Wojtek Weaponry Warranty!
Wojtek Weaponry Warranty
- We will gladly accept the return of products that are defective due to defects in manufacturing and/or workmanship.
- Fulfillment mistakes that may be made which result in the shipment of incorrect products to you will also be accepted for return.
Contact Details:
Please send an email at returns@wojtekweaponry.com
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

















