Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit
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- 90-day no-hassle returns policy
- Backed by the Luth-AR Warranty! what it covers
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High-Quality Mil-Spec Rifle Fixed Buffer Tube Kit for AR-15
If you’re planning to upgrade your AR-15 stock or build your ultimate AR, it is critical to choose the right buffer tube kit. AT3 Tactical provides higher quality mil-spec rifle fixed buffer tube kit from Luth-AR.
This kit includes:
- Rifle Length Buffer Tube
- Standard .308 Buttstock Buffer Spring
- Standard .308 Buffer Body Assembly
Made in the USA
Not sure if you need Mil-spec or commercial buffer tube? The below image shows the difference in dimensions. For more information, please read our article, “Mil-Spec vs. Commercial AR 15 Buffer Tubes – Which One is Better?“.

Customer reviews 1
AT3 Tactical · Thank you for taking the time to leave a review for our Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit. We are thrilled to hear that it exceeded your expectations and worked well with your DPMS. We appreciate your support and look forward to serving you again in the future.
Questions & Answers
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Warranty & returns
Backed by the Luth-AR Warranty!
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 info@luth-ar.com for any warranty issues.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
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.


















