• MBA-4 w-Cheek_Blk
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  • MBA-4-CHP-FF
  • MBA-4 w-Cheek_Blk_Rev

MBA-4 Carbine w/Cheek Rest

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The Luth-AR Modular Buttstock Assembly (MBA) for AR style carbines is designed to replace the standard buttstock on your AR. The MBA-4 with Cheek Rise is designed to work with a 6-position Mil-Spec or Commercial buffer tube. The MBA-4 with Cheek Rise is a direct replacement a standard adjustable carbine buttstock with an adjustable Cheek Rise in a low-cost, lightweight, strong and high-quality design.

The MBA-4 requires a Carbine buffer tube, either Mil-Spec or Commercial. Please review the information provided in the Requirements tab. This stock works with both carbine Commercial and Mil-Spec tubes/assemblies.

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. Built-in rail attachment for attaching a monopod. The MBA features multiple attachment points for a sling, including molded pockets that will accept Grovtec QD cups, sold separately. Available in Black or Flat Dark Earth or Freedom Flag Cheek Rest (Black only).

Due to heavy demand the Flat Dark Earth MBA-4 buttstocks are currently out-of-stock as of 7/20/2020. This product is available for purchase on-back-order and will be shipped as soon as possible. Black is in stock.

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From: $128.10

MBA-4 with Cheek Piece is our new revolutionary designed stock! This stock is to be paired with Carbine AR rifles allowing shooters to have full adjustability. Not only is it the lightest and most affordable fully adjustable carbine buttstock on the market, it includes several stand-out features.

The MBA-4 requires a Carbine buffer tube, either Mil-Spec or Commercial. Please review the information provided in the Requirements tab. This stock works with both carbine Commercial and Mil-Spec tubes/assemblies.

The MBA-4 with Cheek Piece is designed for shooters who do not need the additional Length-of-Pull and 3-axis butt plate adjustability of the MBA-3, but desire the adjustable cheek rise.

Proudly made in the U.S.A

  • 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
  • If you require a butt stock that will utilize the first 2 holes of the buffer tube to fully collapse order an MBA-4 without the cheek rest, order an MBA-4 and a 3-axis buttplate or order an MBA-5 buttstock.
  • Ergonomic
  • Ambidextrous
  • Super Strong Glass Filled Nylon
  • Easy to add buttplate (adjustable Luth-AR accessory)

*This product does not include Sling Swivels or Buffer Tube Assembly, you can purchase those separately on our site.

Features

MBA-4 and cheek piece is our stripped down version of the MBA-3 with cheek rise support.

  • Fits all .223 and most .308 AR style rifles
  • Available in Black or Flat Dark Earth
  • Strong and lightweight, 10 ounces
  • Easy to Replace and quick to install
  • It adds up to 1-inch of height on the cheek rest
  • Adapts To Existing Commercial and Mil-Spec Buffer Tubes
  • Certain after Market Commercial Buffer Tubes that exceed 1.1172″ diameter may not fit
  • Super Strong Glass Filled Nylon
  • Ergonomic
  • Easy to add buttplate (adjustable Luth-AR accessory)
    • If you are upgrading the MBA-4 stock with a butt plate assembly you will need to also purchase the MBA-4 upgrade package
  • 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.

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 with Cheek Piece does not include the following accessories, they can be purchased on our website separately in the Accessories section:

  • Sling Swivels (Side or Rear) Sold Separately, see below. Also see Tech-Tip Videos
  • 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 it may cause the threaded insert to separate from the plastic stock body. 

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: MBA-4-CHP. (Black)

SKU: MBA-4-CHP-FDE

SKU: MBA-4-CHP-FF

Buffer Tube Requirements

The MBA-3 and MBA-4 are Carbine Buttstock and requires the use of a Carbine buffer tube. The MBA-3 and MBA-4 will fit either a Mil-Spec or a Commercial buffer tube. (Note: Some commercial buffer tubes may be oversized from industry norms and may not fit. All commercial buffer tubes sold by Luth-AR will fit the MBA-3 and MBA-4).

Carbine buffer tubes typically have 6 positions of adjustability, and can be distinguished from an A2 style Rifle buffer tube that offers no adjustment positions. Carbine buffer tubes also differ from the A2 by their shape, the A2 Rifle buffer tube is completely round in shape while the carbine buffer tubes have a rectangular appendage to the tube that encloses six position holes. An A2 Rifle buffer tube is substantially longer than a carbine buffer tube.

Carbine buffer tubes typically are offered in two types, Mil-Spec or Commercial. The Mil-Spec carbine buffer tube is visually identified by the 90 degree “cut” at the closed end of the tube. The Commercial carbine buffer tube is visually identified by the 6 degree slant “cut” at the closed end of the tube. A Mil-Spec tube should meet Military Specifications while Commercial tube dimensions are determined by the manufacturer and are typically made from an extrusion. As long as a Commercial buffer tube does not exceed 1.172″ in diameter the MBA-3 and MBA-4 should fit the buffer tube. Using a Commercial buffer tube with an MBA-3 and MBA-4 will typically provide a more “snug” fit due to the slightly larger diameter of Commercial buffer tubes.

If you need to purchase a Carbine Buffer tube we offer buffer tubes individually as well as complete kits. We also offer a Scalloped Commercial Buffer tube for that added custom touch for your AR build.

Buttstock Type

MBA-4

Caliber

.223, .308

Buttstock Weight

9.6 oz

Application

Carbine

Cheek Rise

1" Fully Extended

Overall Length

7 1/2"

Additional Length-of-Pull

None

Available Colors

Freedom Flag, 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.
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