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MBA-4 Carbine Buttstock

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$69.95

The Luth-AR Modular Buttstock Assembly (MBA) for AR style carbines is designed to replace the standard buttstock on your AR. The MBA-4 is designed to work with a 6-position Mil-Spec or Commercial buffer tube. The MBA-4 is a direct replacement a standard adjustable carbine buttstock without additional Length-of-Pull or Cheek rise in a low-cost, lightweight, strong and high-quality design. The MBA-4 also features an anti-rattle set screw. The modular design of the MBA Buttstock allows you to configure your buttstock to your specific and personal needs. The MBA features multiple attachment points for a sling, and has a rail attachment for attaching a monopod. Available in Black or Flat Dark Earth.

Parts Schematic
SKU Color Price Qty
MBA-4 Carbine Buttstock - black-2 MBA-4B Black $69.95
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MBA-4 Carbine Buttstock - flat-dark-earth-2 MBA-4FD Flat Dark Earth $69.95
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Product Description

  • Light weight stock to mount to a carbine rifle  (6-positions mil-spec or commercial tube) – This is our carbine skullaton stock
  • Fits all .223 and .308 AR carbine style rifles
  • Super Strong Glass Filled Nylon
  • 21st century look
  • Ergonomic
  • Easy to replace and quick to install
  • Uses 4 out of the 6 positions on a mil-spec or commercial tube

Features

  • Available in Black or Flat Dark Earth
  • Lightweight buttstock for the carbine AR, weighing in at 9.5 ounces
  • Easy to add our Cheek Piece: Cheek piece will add an additional 1″ height on cheek rest
  • Easy to add our Butt Plate Assembly or 3-Axis Butt Plate Assembly: The assemblies will add an additional 1 1/16″ length of pull with extended length buttplate
  • Adapts To Existing Commercial and Mil-Spec Buffer Tubes
  • Certain after Market Commercial Buffer Tubes that exceed 1.1172″ diameter may not fit
  • Caution: the MBA-3 and MBA-4 Carbine buttstocks are not designed to be used with Large Bore Calibers such as .338 Lapua or .50 BMG applications. See our MBA-1 and MBA-2 Rifle buttstocks as alternatives
  • The MBA-4 Carbine buttstock is NOT interchangeable with A2 standard buffer tube. You will need to purchase a MBA-1 or MBA-2 Rifle buttstock to fit A2 tubes 

Features

  • Picatinny Rail
  • Revolutionary Anti-Rattle Set Screw

Compatible Buffer Assemblies:

  • .223 Mil-Spec Carbine Buffer Assembly
  • .223 Commercial Carbine Buffer Assembly
  • .308 Mil-Spec Carbine Buffer Assembly
  • .308 Commercial Carbine Buffer Assembly

Additional Information

The MBA-4 does not include the following accessories, they can be purchased on our website separately in the Accessories section:

  • Sling Swivels
  • Carbine Buffer tube
  • Carbine Buffer Body
  • Carbine Spring
  • Latch Plate
  • Lock Ring

Installation Notes:  

  • When tightening the anti-rattle set screw, be careful not to over tighten as the threaded insert may separate from the plastic stock body
  • When sliding the buttstock onto a 6-position buffer tube, the lock pin has a notch in the head of the lock pin that must line up with a tab on the stock body. Once the slot and tab are lined up, the pin can be fully retracted allowing the buttstock to slide onto the tube. The MBA-4 should slide easily without resistance. If there is any resistance, the lock pin is not fully retracted. 
Luth-AR Note on Savage Rifles:
Our MBA-4 is designed to fit standard Mil-Spec and Commercial Tubes. Some Savage tubes have been found to be oversized making our stock fit very tightly. Please note that you may need to simply purchase a standard carbine tube in order for this to pair correctly. Note: Customers have reported that the MBA-3 or MBA-4 fit the buffer tube that comes on the new model 110 BA Stealth. If you have the older model 110 BA you may have to simply change the buffer tube.

SKU: MBA4-B — Black

SKU: MBA4-FD — Flat Dark Earth

Shipping Weight 2 lbs
Shipping Dimensions 11.5 x 5.5 x 1.75 in
Application

Carbine

Buttstock Weight

9.6 oz

Extended Length of Pull

15 1/8"

Collapsed Length of Pull

11 5/8"

Overall Length

7 1/2"

Additional Length-of-Pull

None

Cheek Rise

None

Available Colors

Black, Flat Dark Earth

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Luth-AR Note on Savage Rifles:
Our MBA-4 is designed to fit standard Mil-Spec and Commercial Tubes. Some Savage tubes have been found to be oversized making our stock fit very tightly. Please note that you may need to simply purchase a standard carbine tube in order for this to pair correctly. Note: Customers have reported that the MBA-3 or MBA-4 fit the buffer tube that comes on the new model 110 BA Stealth. If you have the older model 110 BA you may have to simply change the buffer tube.