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Questions & Answers
Q&A for Luth-AR MBA-4 Stock Assembly will it fit my 6.5 Grendel ? Expert Answer

It will fit as long as your 6.5 Grendel uses a carbine buffer tube.

by Jonathan D., Gear Expert, October 14, 2019
Will this fit on a Aero Precision M5 .308 rifle buffer? Expert Answer

No, the Luth-AR MBA-4 Stock Assembly is not compatible with rifle length A2 style buffer tubes such as the Aero M5 .308 Rifle Buffer Kit.

by Ethan, Gear Expert, June 27, 2023
Customer Reviews
Helpful Positive Review
Luth AR MBA-4 by David, August 6, 2021
The Luth AR MBA-4 Stock Assembly that I ordered for my Rock Island Armory VR80. I ordered the merchandise on July 31st,and it arrived at my home on August 4th. I was very pleased with Optics Planet's prompt delivery of the items that I purchased. Add...
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1/2 found this helpful
Helpful Positive Review
very impressed by jayviz, Verified Owner, April 2, 2024
I put this on a light weight AR10 hunting rifle that I built. I wanted a light weight and adjustable stock that had some mass to it. This tock is around 9oz which is pretty light in comparison. It has nice ergonomics for shooting on bench or laying d...
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1/1 found this helpful
Helpful Positive Review
Perfect for AR10 by freedombirdies, Verified Owner, October 9, 2020
I put this stock on an Aero Precision 18” AR10 build. Felt great, nice cheek weld, but also sleek & easy to maneuver with. This stock is a superb choice on any carbine buffer SPR. Most of Luth-AR’s stocks are decent. This “minimalist” version, at lea...
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2/2 found this helpful
Helpful Negative Review
I Had High Hopes... by JG, Verified Owner, July 15, 2021
I hate when people have unrealistic expectations for something they purchased, or when they don't spend much time with a product before reviewing it. I have had this stock on an AR-10 20" 308 build for about 6 months now, and I'm sorry to say it is ...
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8/8 found this helpful
Most Recent Reviews
AR But stock by Cobraguy, Verified Owner, January 15, 2025
This ar style but stock is what I was looking for. It is very versatile adjustable LOP, adjustable Cheek rest. It also gives you a mount for a rear bipod and it also shoots well off a rear bag. It’s very lightweight. I would recommend for any AR styl...
Read More...
Most Recent Reviews
AR15 buttstock by RayC, Verified Owner, November 30, 2024
I have them on 4 rifles already. They are lightweight and easy to use.i like the bag rider on the bottom of the stock.
Read All 11 Reviews
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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Luth-AR MBA-4 Stock Assembly

The Moeba Tactical MBA-4 Buttstock Assembly is a complete kit that includes everything you need to assemble a carbine buffer system on your .308 AR style rifle. These Rifle Stocks from Moeba Tactical are easy to install and designed to last. The buttstock included in the Moeba Tactical MBA-4 Rifle Stock Assembly kit is made of super strong glass-filled nylon and weighs roughly half as much as comparable stocks. With a built-in Picatinny rail, the buttstock offers plenty of space for your favorite accessories. Enhance your shooting experience with the lightweight and durable moeba tactical MBA-4 Rifle Stock Assembly. Caution: the MBA-1, MBA-2, and MBA-3 Carbine buttstocks are not designed to be used with large bore calibers such as .338 Lapua or .50 BMG applications.image

Specifications for Luth-AR MBA-4 Stock Assembly:

Manufacturer: Luth-AR
Gun Model: AR-10, AR-15
Gun Type: Carbine
Weight: 9.6 oz
Length: 7.5 in
Condition: New
Gun Make: AR Platform
Country of Origin: USA

Features of Luth-AR MBA-4 Stock Assembly

  • Lightweight buttstock for the carbine AR, weighing in at 9.5 ounces
  • Picatinny Rail
  • Revolutionary Anti-Rattle Set Screw
  • 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

Package Contents:

  • Luth-AR MBA-4 Stock Assembly

Luth-AR MBA-4 Stock Assembly Orderable Models

List of Orderable Models

  • Luth-AR MBA-4 Stock Assy. with Commerical .308 Kit, FDE, MBA-4FK308-C , MPN: MBA-4FK308-C , UPC: 859992007500 , Code: 3FN-BSC-MBA4S-MBA-4FK308-C
  • Luth-AR MBA-4 Stock Assy. with Commerical .223 Kit, FDE, MBA-4FK-C , MPN: MBA-4FK-C , UPC: 859992007524 , Code: 3FN-BSC-MBA4S-MBA-4FK-C
  • Luth-AR MBA-4 with Cheek Riser, Black, MBA-4-CHP , MPN: MBA-4-CHP , UPC: 859819007027 , Code: 3FN-BSC-MBA4S-MBA-4-CHP
  • Luth-AR MBA-4 Skullaton Stock Assembly, Black , MPN: MBA-4 , UPC: 862388000153 , Code: 3FN-BSC-MBA4S-MBA-4
  • Luth-AR MBA-4 Skullaton Stock Assembly, FDE, MBA-4F , MPN: MBA-4F , UPC: 859819007010 , Code: 3FN-BSC-MBA4S-MBA-4F
  • Luth-AR MBA-4 Stock Assy. with Commerical .223 Kit, Black, MBA-4K-C , MPN: MBA-4K-C , UPC: 859992007487 , Code: 3FN-BSC-MBA4S-MBA-4K-C
  • Luth-AR MBA-4 Stock Assy. with Mil-Spec .223 Kit, Black, MBA-4K-M , MPN: MBA-4K-M , UPC: 859992007494 , Code: 3FN-BSC-MBA4S-MBA-4K-M
  • Luth-AR MBA-4 Stock Assy. with Mil-Spec .223 Kit, FDE, MBA-4FK-M , MPN: MBA-4FK-M , UPC: 859992007531 , Code: 3FN-BSC-MBA4S-MBA-4FK-M
  • Luth-AR MBA-4 Stock Assy. with Commerical .308 Kit, Black, MBA-4K308-C , MPN: MBA-4K308-C , UPC: 859992007463 , Code: 3FN-BSC-MBA4S-MBA-4K308-C
  • Luth-AR MBA-4 Stock Assy. with Mil-Spec .308 Kit, Black, MBA-4K308-M , MPN: MBA-4K308-M , UPC: 859992007470 , Code: 3FN-BSC-MBA4S-MBA-4K308-M
  • Luth-AR MBA-4 Stock Assy. with Mil-Spec .308 Kit, FDE, MBA-4FK308-M , MPN: MBA-4FK308-M , UPC: 859992007517 , Code: 3FN-BSC-MBA4S-MBA-4FK308-M

Luth-AR MBA-4 Stock Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • Luth-AR MBA-4 with Cheek Riser, FDE, MBA-4-CHP-FDE , MPN: MBA-4-CHP-FDE , UPC: 859992007159 , Code: 3FN-BSC-MBA4S-MBA-4-CHP-FDE
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Last updated 2026-10-09 UTC.