AT3™ Low Profile Micro Steel AR-15 Gas Block - 4 Sizes Available
or 4 interest-free payments of $3.79 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the AT3 Lifetime Warranty! what it covers
Frequently bought together
From orders that included this item
Product description
This premium Steel Micro Gas Block comes in 4 sizes: .625″, .75″, .875″, and .936″.
We have a fit for every barrel!
FEATURES:
- 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 free floating handguard
- Steel construction (better than aluminum for withstanding extreme temperatures)
- Secured using 2 set screws (screws, allen wrench and roll pin included)
- Backed by the AT3 Lifetime Warranty
SPECIFICATIONS
- Material: 4150 Steel, Black Finish
- 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:
All 4 options on this page
- AT3™ Low Profile Micro Steel AR-15 Gas Block - 4 Sizes Available - Title: .750" Micro Gas Block | SKU: GB-75S
- AT3™ Low Profile Micro Steel AR-15 Gas Block - 4 Sizes Available - Title: .625" Micro Gas Block | SKU: GB-625S
- AT3™ Low Profile Micro Steel AR-15 Gas Block - 4 Sizes Available - Title: .875" Micro Gas Block | SKU: GB-875S
- AT3™ Low Profile Micro Steel AR-15 Gas Block - 4 Sizes Available - Title: .936" Micro Gas Block | SKU: GB-936S
Customer reviews 119
Verified buyerIs this a common issue when a new float rail and gas block are installed/upgraded? If so, is the fix as easy as upgrading to a new buffer tube spring? Or do I also need to upgrade to a heavier buffer as well, so a buffer spring combo? What sizes/weights should I get?
Note, all the other upgrades and parts are great and went without a hitch! Fast service and quality gear.
Thanks for any suggestions
AT3 Tactical · Hi there, thank you for your feedback! We apologize for any inconvenience you experienced with the gas tube not fitting initially. We're glad to hear that drilling the hole solved the issue and that the gas block is now working great for you. If you need any further assistance, please don't hesitate to reach out to us. Thank you for choosing our product.
AT3 Tactical · Thank you for your review! We're glad to hear that our AT3™ Low Profile Micro Steel AR 15 Gas Block was a perfect fit for your Smith & Wesson AR15. We take pride in creating high-quality products that meet the needs of our customers. Happy shooting!
AT3 Tactical · Thank you for taking the time to leave us a positive review! We're glad to hear that our AT3 Low Profile Micro Steel AR 15 Gas Block was able to meet your expectations and work seamlessly with your Spear M-lock hand guard. We're also happy to know that our installation videos were helpful in the process. We appreciate your support and we look forward to serving you again in the future.
Questions & Answers 1
Loading questions…
Warranty & returns
Backed by the AT3 Lifetime Warranty!
All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.
This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.
In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.
If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.
If your product is in need of warranty service, please contact AT3 Tactical to start the process
Our contact info is available here. To expedite processing, please provide your order information and description of the defect.
Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.
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.
