Aero Precision Click Adjustable AR-15 Gas Block

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AT3™ AR 15 Gas Tube & Carbine Gas Tube Length

AT3™ AR 15 Gas Tube with Roll Pin - Carbine


AT3™ AR 15 Gas Tube & Carbine Gas Tube Length

AT3™ AR 15 Gas Tube with Roll Pin - Midlength


Aero Precision Adjustable Gas Block

Aero Precision’s new adjustable gas blocks come in all standard AR-15 gas block sizes, and fit under free-float handguards. The gas block attaches to the barrel using the included set screws, and work with regular AR-15 gas tubes. Once installed, you can easily adjust the rifle’s gas flow from the forward adjustment screw, with 15 settings of positive, audible clicks.

Will this fit under my free float handguard?

These gas blocks are especially designed to fit under slim free-float handguards. Since the adjustment hardware is forward of the gas block, the profile remains slimmer compared to other gas blocks. The AT3 SPEAR M-LOK Rail and Quad Rail, the Aero ATLAS S-One and R-One, and more will work great with these gas blocks. If you’re unsure of the fit, just reach out to us so we can assist you!

How To Install the Aero Adjustable Gas Block

First, you’ll need to remove your standard gas block and tube from your rifle. Slide the Aero Adjustable Gas Block onto your barrel, and align it over with your barrel’s gas port. Then, secure the set screws at the bottom to the barrel, tightening to 30 inch pounds. For extra security, apply a small amount of high-temperature threadlocker to the bottom set screws.

Note: Do not use threadlocker of any kind on the gas block adjustment screw. Only use threadlocker on the set screws that attach the gas block to the barrel.

After the threadlocker cures, secure your gas tube to the gas block with a roll pin. For more info on how to set up your gas block at the range, check out this guide to installing and tuning your gas block.


  • Standard low-profile design provides great fit under slim profile free float handguards including the Aero Precision ATLAS series of handguards
  • Adjustment screw is held in place by a spring and detent, providing repeatable audible “clicks” upon adjustment removing the need for secondary set screws that can come loose under recoil
  • Custom machined stainless-steel adjustment screw provides 15 gas adjustment settings
  • Carbon fouling is channeled to a sacrificial chamber to help prevent carbon locking, as well as provide an access point for solvent in the event carbon locking does occur
  • User-serviceable design allows for service and cleaning of the gas system


  • Assembled Adjustable Gas Block
  • One 6″ 3/32 adjustment wrench for easy gas block adjustment underneath installed handguard
  • Replacement spring and detent included


  • Fit: AR-15 and AR-10 Platform
  • Material: 4140 Steel
  • Finish: Black Nitride
  • Weight: 1.4 oz

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Have Questions About this Product?

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.

Aero Precision Warranty

If for any reason you have a warranty issue with one of our products, please contact us at 253-272-8188.

Please describe your situation, include your name and order number or transaction id. One of our technical specialists will then review your claim and contact you within 3-5 business days.

If you have images to send, please email them to

Damaged Items

In regards to claims dealing with damaged or blemished products, we ask that you create a Help Desk Ticket on your My Account page. If you don’t have an account with us, please go to the Contact Us page and fill out the form for review within 72 hours upon receiving the shipment.

If you have images to send, please email them to

Failed Background Check

There will be a 30% restocking fee on all lower receivers returned because of failed background checks.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 6 reviews
David Jones

Super easy to adjust. Rifle is cycling flawlessly.

Thank you for your positive review! We're thrilled to hear that our Aero Precision Click Adjustable AR-15 Gas Block is working perfectly for you and that the adjustment process was easy. We take pride in providing high-quality products that function flawlessly. Happy shooting!

Chris Rivas

Aero Precision Click Adjustable AR-15 Gas Block

Thanks for the review. We really appreciate it!

Jasper Kearl
Easy to use

Installed on 16” upper along with the Aero Atlas S-one rail and the two go together very well the adjustment Allen key that it comes with is the perfect length for mid length gas system and was a breeze to tune will buy more for future builds

Thank you for sharing your feedback! We're glad you are satisfied with your purchase!

Marc Guidry
Adjustable gas block

Very grateful AT3 had the Areo Precision adjustable gas block because Areo didn’t even have it. I’ll be sending y’all more business.

Thank you for your kind words! We're glad to have helped you out.

nice gas block with a design flaw

I really liked the features for this gas block, so I bought this for my heavy barrel 24" AR15. The reason I bought the GB was for running the gun suppressed without getting a ton of gasses in my face. The good thing is that while suppressed it solved the gas in the face problem. The bad thing is that unsuppesed, even on the wide open setting, it's not passing enough gas to cycle the bolt.

I'm sure it works for some guns in specific configurations, however it does not work for a rifle length gas system with a A1 stock and buffer, in my case. I will try a weaker buffer spring and see if that let's the gun cycle unsuppressed.

My recommendation to the Mfg is to provide a list of firearms this gasblock was tested on and the firearm's configuration for customers.