Luth-AR MBA-4 Stock for Mil-Spec or Commercial AR-15 Buffer Tubes

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Adjustable MBA-4 Stock with Optional Cheek Riser

Luth-AR brings their expertise in modular, ergonomic buttstocks to the MBA-4 buttstock with optional cheek riser. This stock features an anti-rattle set screw for a secure cheek weld, and fits onto mil-spec or commercial buffer tubes. The design makes the MBA-4 ideal for precision shooting, including a picatinny rail for a rear monopod. Plus, the cheek riser adds up to 1 inch of height for ideal optical alignment.

Note: Certain aftermarket Commercial Buffer Tubes that exceed 1.1172″ diameter may not fit with this stock. 


  • Fits all .223 and .308 AR style rifles
  • Strong and lightweight
  • It adds up to 1-inch of height on the cheek rest
  • Easy to Replace and quick to install
  • Features Picatinny Rail
  • Adjusts to 14.75″ Length-Of-Pull
  • Revolutionary Anti-Rattle Set Screw
  • Adapts To Existing Commercial and Mil-Spec Buffer Tubes
  • Uses 4 out of the 6 positions on a mil-spec or commercial tube
  • Super Strong Glass Filled Nylon Construction


  • Fit: AR-15 Mil-Spec or Commercial Buffer Tubes
  • Material: Glass Filled Nylon
  • Weight – 9.6 oz
  • Cheek Rise: 1″ Fully Extended
  • Collapsed Length-of-Pull: 11 5/8″
  • Extended Length-of-Pull: 15 1/8″

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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.