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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 9 reviews
Satisfied customer

I recently purchased a mil-spec Magpul Furniture kit from AT3 Tactical and after I received it I realized that my buffer to was not mil-spec. I then contacted them with my problem and they sent me one out as a reasonable price with free shipping.
Excellent customer service and I definitely will be ordering more in the future.

Thanks for sharing your feedback, John. We're glad you're satisfied with your purchase.
Buffer tube

It's a buffer tube with six hole, what more do you want? Granted for the price it is a very nice product.

Thanks for sharing your feedback, Louis. We're glad you're satisfied with your purchase. Cheers! - AB
Buffer Tube

Good service and support. Will be buying here again.

Thanks for sharing your experience, Felix. We can't wait to have you back. - AB
Mil-spec buffer tube

Ordered this buffer tube to upgrade to the buttstock with an OD Green furniture kit. Great price and a simple part to change out. Look forward to ordering more from AT3Tactical.

Thanks for choosing AT3, Brandon. We're glad you're satisfied with your purchase. - AB
Great quality

Works great and best price available. Will buy more.