AT3™ Carbine Tube and .75″ Low Profile Long AR 15 Gas Block – Steel

SKU: GBGT-7507L-2

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The AT3 Long Low Profile Gas Block is designed to cover up barrel scars that are left after removing an AR-15 front sight base

  • ?Roll Pin included

How do I know this will fit? Measure the distance from the barrel shoulder to the gas port on your barrel if it is 7 inches than this will work.


  • 3/4″ (.75″) size – works with any .75″ AR-15 barrel
  • Perfect for use with long AR15 handguards that cover the gas block
  • Length is designed to cover up blemishes on barrel after removing front sight base
  • Secured with 3 set screws (screws, allen wrench and roll pin included)
  • ?Backed by the AT3 Lifetime Warranty


  • Material: 4150 steel
  • Finish: Phosphate coating (matte black)
  • Length: see pictures
  • Inside Diameter: .75″
  • Weight: 2.7oz
  • Packaging: PE Bag


  • Material: Stainless Steel
  • Finish: Natural
  • Total Tube Length: 9 3/4″

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.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron 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.

Customer Reviews

Based on 2 reviews
AR build

great price very quick delivery finished my AR build with your products low pro gas block and 15" key mod rail excellent quality and will be buying more of your products thank you AT3....

Gas Block

It was everything they said it was great install and works great!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase. Cheers!