Luth-AR MBA-1 Fixed AR-15 Rifle Stock with 3-Axis Butt Plate

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

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


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

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

Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit

Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit


Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit

Luth-AR .308 Mil-Spec Rifle Fixed Buffer Tube Kit

AR-15 Buttstock with Horizontal, Vertical, and Lateral Buttplate Adjustment

For even greater customization than the MBA-1 buttstock, this version adds a 3-Axis buttplate for better ergonomics and precision. After attaching this stock to an A1/A2 style buffer tube, the shooter can set their precise length of pull, cheek weld, and even fine-tune how the buttplate rests on their shoulder. This is a great stock if you’re looking for the most comfortable option for shooting long range with an AR.

Be sure to pick up a Luth-AR rifle buffer tube kit if you don’t already have a fixed stock to replace. There is an equivalent kit for AR-10/.308 rifles here.


  • 3-axis Adjustable Butt Plate Assembly extends additional 1 1/16″ length of pull and includes the following movement:
    • Horizontal for linear adjustment (i.e. length of pull)
    • Vertical for a perfect butt plate fit into the curvature of the shoulder.
    • Lateral adjustment for a ½ inch left or right cast
  • Interchangeable with standard A1 or A2 buttstocks or any aftermarket buttstock with overall length of approximately 10.5″
  • Fully Ambidextrous and can be comfortably used shooting off either shoulder (Cheek piece pre-installed for right handed shooters but can be installed on either side for right or left hand shooters)
  • Cheek piece not only moves up and down, it also moves back and forth on the stock
  • NOT interchangeable with carbine/collapsable rifles with telescoping assemblies (6-position tubes). You will need to purchase a MBA-3 or MBA-4 to fit these carbine tubes 


  • Fit: AR-15 A1/A2 Buffer Tubes
  • Material: Glass Filled Nylon
  • Weight: 18.4 oz
  • Cheek Rise: 1″ Fully Extended
  • Collapsed Length-of-Pull: 10.5″
  • Extended Length-of-Pull: 11 1/2″
  • Additional Length-of-Pull: 1 1/16″

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 1 review
William Price
luth ar stock

i have built some high end ar rifle guns . i like the fit and the quality that luth ar offers. at3 tactical has been a great supplier of unique parts and Kevin with his tec support has helped me in my custom builds.luth ar is top shelf.

Thank you for your review of the Luth-AR MBA-1 Fixed AR-15 Rifle Stock with 3-Axis Butt Plate. We're glad to hear that you're enjoying the quality and fit of the stock.