AT3™ Mil Spec AR-15 Buffer Tube – 10 Colors Available

Click Here for Price
Out of Stock
Orders will Ship within 1 Business Day
AT3 Tactical Carbine Buffer Spring for AR15

AT3™ Carbine Buffer Spring for AR-15


AT3 Tactical AR-15 Heavy Buffer - H2 (2 Tungsten Weights)


Mil-Spec AR-15 Carbine Buffer Tube

Made 6061-T6 aluminum construction with a black anodized finish, with six precision-machined notches to securely lock your stock into position. This buffer tube has a mil-spec diameter for broad compatibility with all mil-spec stocks on the market. Plus, we offer 9 durable Cerakote finishes for a custom look!

AT3 cannot warranty against Cerakote™ inconsistencies or the wearing of coatings over time.


  • Tube Diameter: 1.146″ (Mil Spec)
  • Length: 7 1/4″
  • Thread type: 1 3/16-16 UN-3B SPECIAL
  • Material: 6061-T6 Aluminum
  • Finish
    • Black: Phosphate
    • Flat Dark Earth: H-267 Magpul® Flat Dark Earth
    • OD Green: H-232 Magpul® OD Green
    • Gray: H-188 Magpul® Stealth Grey
    • Pink: H-224 SIG™ Pink
    • Red: H-167 USMC Red
    • Blue: H-171 NRA Blue
    • Burnt Bronze: H-148 Burnt Bronze
    • Tungsten: H-237 Tungsten
    • Titanium: H-170 Titanium
  • Backed by the AT3 Lifetime Warranty

Products available on this page:

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 97 reviews
Great product

Quality and affordable! 10/10

Dean Toro
Very nice

I bought one of the black ones for a blackout 300 I built for my friend and it was super light, but was machined and finished very well. I will for sure use these on my next builds

Thanks for taking the timeout to share your feedback, we're glad you are satisfied with your purchase!

Jaimie Clarke
Solid product/buffer tube

The burnt bronze matches the rest of the build perfectly 👌🏽

Kevin hobbs
Buffer tube

Looks good fit finish is great

Thank you for your review! We're glad to hear that you are pleased with the fit and finish of our AT3™ Mil Spec AR-15 Buffer Tube. We strive to provide high-quality products in a variety of colors to meet our customers' needs. Thank you for choosing AT3 Tactical!

Jeremy Williams
AT3™ Mil Spec AR-15 Buffer Tube: Affordable Excellence in Performance and Installation

Review: AT3™ Mil Spec AR-15 Buffer Tube

The AT3™ Mil Spec AR-15 Buffer Tube offers exceptional value for gun enthusiasts seeking reliability and durability without breaking the bank. With its solid construction and Mil-Spec design, this buffer tube provides a cost-effective solution for upgrading or building AR-15 platforms. Despite its affordable price point, the quality of materials and craftsmanship ensure long-lasting performance, making it a worthwhile investment for both seasoned shooters and beginners alike.

When it comes to performance, the AT3™ Mil Spec AR-15 Buffer Tube delivers outstanding results. Designed to withstand rigorous use and maintain consistent functionality, this buffer tube enhances the overall shooting experience. Its precise engineering ensures smooth cycling of the firearm, reducing recoil and enhancing accuracy. Whether engaging in target shooting, competition, or tactical applications, users can rely on the dependable performance of this buffer tube to enhance their firearms' capabilities.

Ease of Installation:
One of the standout features of the AT3™ Mil Spec AR-15 Buffer Tube is its ease of installation. Designed with user convenience in mind, this buffer tube can be quickly and effortlessly installed on AR-15 rifles without the need for specialized tools or expertise. The straightforward installation process ensures that even novice gun enthusiasts can upgrade their firearms with confidence. Additionally, the included instructions provide clear guidance, further simplifying the installation process. Overall, the AT3™ Mil Spec AR-15 Buffer Tube offers a hassle-free upgrade solution for firearm enthusiasts of all skill levels.

In summary, the AT3™ Mil Spec AR-15 Buffer Tube combines exceptional value, reliable performance, and ease of installation, making it a top choice for gun owners looking to enhance their AR-15 rifles. Whether for recreational shooting, competition, or tactical use, this buffer tube delivers on its promises, providing a solid foundation for a customized and optimized firearm setup.

Thank you for taking the time to share your positive experience with the AT3™ Mil Spec AR-15 Buffer Tube. We are thrilled to hear that you have found it to be of exceptional value, offering reliable performance and easy installation.

We take pride in providing our customers with high-quality products at affordable prices, and we are glad to know that you have had a positive experience with our buffer tube. We hope it continues to enhance your shooting experience and meet your expectations.