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Low Profile Micro Steel Gas Block - 4 Sizes Available - AT3 Tactical

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You will receive fast, free shipping for all orders over $35

Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS. 

Most orders ship out within 24 hours

You will receive tracking information immediately at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses.  

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

If you need to request a return, contact us at 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 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 - we will do our best to make it right.

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This premium Stainless Steel Micro Gas Block comes in 4 sizes: .625", .75", .875", and .936". We have a fit for every barrel!
  • 4 sizes available: .625", .75", .825", and .936 (.75" is the most common size, but always measure the barrel if you aren't sure!)
  • Low profile design, perfect with our quad rail systems
  • Steel construction (better than aluminum for withstanding extreme temperatures)
  • Secured using 2 set screws (screws, allen wrench and roll pin included)
  • Material: 4150 Steel, Phosphate Coated
  • Length: 1"
  • Height: Sits 3/8" off of the barrel (fits under all free float handguards!)
  • Weight: 1.5-1.8oz 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: Our micro 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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