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AT3™ Mil Spec Buffer Tube - AR-15

AT3™ Mil Spec Buffer Tube – AR-15

In Stock

Lifetime WarrantyOn All AT3 Brand Products

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.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

This 6-Position AR-15 Mil-Spec buffer tube is perfect for your next AR-15 build, or as an upgrade on existing commercial-spec tube.

Made 6061-T6 aluminum construction with a black anodized finish, with six precision machined notches to securely lock your stock into position.


  • 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 Anodized
  • Backed by the AT3 Lifetime Warranty

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Customer Reviews

Based on 15 reviews
5 star

AT3 is a stand up company. Their products and quality is great!!! No one ever wants an issue with an order, but hey it happens we are all human. What you can count on is if there are any issues AT3 will stand behind it and take care of it immediately. They ship promptly and their technical support and customer service is 2nd to none.

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

This was a perfect fit for my AR 15, the price was right and came quickly in the mail. Will certainly look forward to doing more business with you. Thanks

Thanks for sharing your feedback, Carlos. We're glad you're satisfied with your purchase. Cheers!
Mil spec buffer tube, nothing special

Not perfect because there was a blemish on the threads (deep enough nick to show raw aluminum underneath). Acceptable because it'll be screwed into the lower and not visible.

Sorry to hear about the issue, PN. We can always help facilitate an exhcange if you could reach out to us.
Magpul furniture kit

My son and I bought the furniture kits for our AR's. Good quality, good price and it looks good.

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

Still in the process of building so I have not been able to test it out yet. Great price and fast shipping. We be back for some more needed parts.

Thanks for sharing your experience, Chris. We're glad you're satisfied with your purchase. Cheers!