CMMG ZEROED AR-15 Gas Block - Adjustable - .750" - Steel
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- Backed by the CMMG Warranty! what it covers
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From orders that included this itemProduct description
Adjust Your Rifle To Different Ammo Types and Suppressors
Dial in your rifle’s performance with the CMMG ZEROED Adjustable Gas Block. Designed for .750″ barrel profiles and built from rugged steel with a corrosion-resistant finish, this gas block offers consistent, repeatable adjustments to fine-tune your rifle for various ammo types, suppressor use, or specific shooting needs. The low-profile design fits under most free-float handguards and installs easily with included set screws. What makes this adjustable gas block different from others is the ability for users to clean the gas chamber to prevent carbon locking, solving a huge problem most other gas blocks have. This gas block uses a 6″ 3/32 hex wrench to turn a screw to find that goldilocks setting that works for your rifle setup.
Features
- 20 gas flow settings for fine-tuning rifle performance
- The sacrificial cleanout chamber and user-serviceable design provide excess carbon a place to go where you can still clean it
- Fits standard .750″ barrel journals
- Machined from durable steel with corrosion-resistant finish
- Low-profile design fits under most free-float handguards
- Ideal for suppressed rifles, over-gassed setups, or custom builds
- Includes set screws for secure installation
Specifications
- Brand: CMMG
- Model: ZEROED Adjustable AR-15 Gas Block – .750 Inch
- MPN: 55DA31F
- Fit: .750 Barrel
- Firearm Type: AR-15/AR-10
- Color: Black
- Material: Steel
- Finish: Nitride
Customer reviews 5
The fit to the barrel is secure and I added a bit of lube to slide it on the barrel .
AT3 Tactical · Hi there, thank you for your feedback. We're sorry to hear that you had trouble with our gas block on your 6.5 grendel. We stand by the quality and performance of our products, so we would be happy to assist you in troubleshooting the issue or finding a solution that works for you. Please feel free to reach out to our customer service team for further assistance. Thank you for your support.
AT3 Tactical · Thank you so much for taking the time to leave a review for our CMMG ZEROED Adjustable gas block. We're so glad to hear that you found it to be a solid product at a great price. We're also happy to hear that you had a smooth installation process and were able to easily adjust for running supers and subs. Thanks again for your support and happy shooting!
Questions & Answers 1
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Warranty & returns
Backed by the CMMG Warranty!
CMMG Warranty
Seller warrants to Buyer that for a period of 6 months from the Delivery Date, all Goods will be:
- Free from any defects in workmanship, material, and design
- Conform to applicable specifications[, drawings, designs, samples and other requirements specified by Buyer]
- Fit for their intended purpose and operate as intended
- Merchantable
- Free and clear of all liens, security interests or other encumbrances
- Not infringe or misappropriate any third party’s patent or other intellectual property rights.
Inspection and Rejection of Nonconforming Goods
The Buyer has the right to inspect the Goods for a period of thirty (30) days after the Delivery Date. Buyer, at its sole option, may inspect all or a sample of the Goods and may reject all or any portion of the Goods if it determines the Goods are non-conforming or defective.
If Buyer rejects any portion of the Goods, Buyer has the right, effective upon written notice to Seller, to:
- Rescind the Order in its entirety
- Accept the Goods at a reasonably reduced price
- Reject the Goods and require replacement of the rejected Goods.
NOTES:
If Buyer requires replacement of the Goods, Seller shall, at its expense, promptly/within 30 days replace the nonconforming Goods and pay for all related expenses, including, but not limited to, transportation charges for the return of the defective goods and the delivery of replacement Goods.
If Seller fails to timely deliver replacement Goods, Buyer may replace them with goods from a third party and charge Seller the cost thereof and terminate this Order for cause pursuant to Section 20.
Any inspection or other action by Buyer under this Section shall not reduce or otherwise affect Seller’s obligations under the Order, and Buyer shall have the right to conduct further inspections after Seller has carried out its remedial actions.
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.

















