Luth-AR .223/5.56 AR-15 Mil-Spec Rifle Fixed Buffer Tube Kit

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Luth-AR Fixed Rifle Buffer Tube Kit

The Luth-AR Fixed Rifle Buffer Tube Kit includes an A1/A2 length buffer tube, buffer, and buffer spring. This long recoil assembly helps to mitigate felt recoil to the shooter with the long travel and heavier weight than a carbine buffer. This assembly comes ready to assemble on the back of a mil-spec lower receiver, and will work with A1 and A2 style stocks.


  • A2 Receiver Extension Tube
  • Standard Rifle 223 Buffer Spring
  • Standard Rifle Buffer Assembly


  • Fit: AR-15
  • Buffer Tube Material: 6061-T6 Aluminum
  • Buffer Tube Finish: Hardcoat Anodized
  • Buffer Weight: 5.1 oz.

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.

Luth-AR Limited Warranty

  • Luth-AR, LLC manufactured products are warranted for 1 (one) year from the date of purchase against manufacturing defects in material and/or workmanship. All parts and labor or replacement, at our option, are covered.
  • Government fees, damage caused by failure to perform normal maintenance, sales outside the United States, damage due to high velocity, high pressure, reloaded, or other non-standard ammunition, or any unauthorized repair, modification, misuse, abuse, or alteration of the product is not covered by this limited warranty.
  • Consumable items such as gas rings, O’ rings, etc., are not warranted.
  • Luth-AR, LLC complete assembled uppers will be warranted for a period of 1 (one) year after the complete upper was purchased.
  • The warranty applies towards defects in materials or workmanship of the complete upper. Luth-AR will pay for all warranty repairs, at no charge to the consumer. Please supply a copy of the invoice for proof of purchase.
  • The use of re-load ammunition, proof rounds, or factory ammunition that exceeds initial SAAMI specifications voids any warranty. Any repairs or modifications not done by Luth-AR also voids any warranty.
  • Complete uppers not assembled or built by Luth-AR are not covered by the 1 (one) year warranty.
  • Please call our warranty department at (763) 263-0166 or email for any warranty issues.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 4 reviews
Kenneth Ames

Luth-AR .223/5.56 AR-15 Mil-Spec Rifle Fixed Buffer Tube Kit

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

John Pahl Sailboatbum
Luth-AR .223/5.56 AR-15 Mil-Spec Rifle Fixed Buffer Tube

my go to buffer tube for any of my AR builds. LUTH - AR can always be trusted

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

Robert Ross
Easy assembly

Goes together with lower and butstock with no problem.

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

Johnny B - 180 Second Ideas

Product from LUTH-AR is outstanding. Good fit and finish. Install was easy and absolutely zero problems. Happy!

We are glad to hear that you are pleased with the kit that you purchased.