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+ 12% Off Select AR15 Parts Use Code: ARBUILD12

AR-15 STOCK ASSEMBLY COLLAPSIBLE CARBINE LENGTH Reviews & Ratings

The Luth-AR Modular Buttstock Assembly (MBA) for AR style carbines is designed to replace the standard buttstock on your AR. The MBA-3 is designed to work with a 6-position Mil-Spec or Commercial buffer tube. The MBA-3 features a 3-Axis Buttplate with Length-of-Pull adjustment as well as height and lateral adjustments, and an adjustable cheek rise in a low-cost, lightweight, strong and high-quality design.

The MBA-3 requires a Carbine buffer tube, either Mil-Spec or Commercial. This stock works with both carbine Commercial and Mil-Spec tubes/assemblies.

The MBA-3 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. Includes a 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.

Ergonomic Design
Adapts To Existing Commercial and Mil-Spec Buffer Tubes
Certain after Market Commercial Buffer Tubes that exceed 1.172″ diameter, may not fit
The vertical struts for the MBA-3 are fixed, therefore the cheek piece is not reversible like the MBA-1 however the cheek piece itself is designed with a cheek pad for left-handed use
Caution: the MBA-3 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-3 Carbine buttstock is NOT interchangeable with A2 standard buffer tube. You will need to purchase an MBA-1 or MBA-2 Rifle buttstock to fit A2 tubes.

The Luth-AR adjustable buttstock is constructed of durable lightweight polymer and available in Black or FDE.

See all of our AR15s and AR15 parts here.

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Reviews Summary

Overall, the AR-15 Collapsible Stock Assembly is well-received for its adjustability and comfortable fit. Users appreciate its modular design and how it accommodates different users, though some have noted issues with fit on certain buffer tubes and the quality of the butt pad. Customer service has garnered positive feedback, adding to the product's appeal.

What Reviewers Are Saying

Adjustability

80%

Many reviewers praise the stock for its adjustable features, including length of pull and cheek height, making it suitable for various users and shooting styles. This flexibility enhances comfort and usability for multiple shooters, especially with different body types and preferences.

Fitment Issues

50%

Several users reported problems with the stock fitting securely on both MilSpec and Commercial buffer tubes. While adjustable features are strong, the play or wobble on certain setups can be a concern, leading customers to seek solutions like additional tape or modifications.

Comfort and Padding

30%

Reviewers expressed mixed feelings about the butt pad's comfort, with some finding it hard and uncomfortable. A few suggested upgrading to aftermarket pads for better shooting experience, indicating that the basic pad may not meet all users' expectations.

Customer Service

40%

LUTH-AR's customer service received commendations for being helpful and responsive, reflecting positively on the company’s commitment to customer satisfaction. Users feel reassured knowing assistance is available if they encounter issues.

Value for Money

70%

The stock is frequently mentioned as a great value for its price, with many users satisfied with its functionality and features compared to more expensive models. This sentiment enhances the overall appeal of the product.

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Good buy

Great product if you don't want a full length shooter stock. The reason I only gave it a 4 star is because it "fits both Commercial and MilSpec buffer tubes" Although it does have a set screw that will lock it in fairly good, it is not like a good fitting stock on a tube. I recommend that if you have a MilSpec tube, get some 10 mil UHMW tape and put it along your tube at the 10 and 2 o'clock positions. It took me 20 mils to make it snug as I prefer. Other than that sight fitting step, Great Stock!

Much better than my original A2 stock

I like the adjustable comb, as it allows a much better cheek-weld when using a scope on a quick-detach mount on the flattop upper of my H-BAR. The adjustable length of pull allows for more precise fitting than just the 6 holes in the carbine buffer, which is great for adjusting to different thicknesses of clothing, different shooting positions, etc.

Great stock

I am using this on a carbine buffer tube on a high-accuracy AR15 build. The installation is easy, the number of and amount of adjustments is extensive, and the set screw does a good job of taking the normal slop out of the stock. It is a modular design so each adjustment element can be removed or installed as desired. Basically the lower models of this stock are the same frame with fewer adjustment add-ons. One thing to note is the cheek height is ever so slightly higher than a standard carbine stock cheek rest. So if your scope offset is right on the edge of being too low for your eye level you may want a taller scope ring set. Customer service at LUTH-AR is fantastic. In the unlikely event you have any issues they will help out.

What I was looking for.

Being left handed I wanted something that was ambidextrous. This is. I needed an adjustable comb to center the Cmore red dot with a cheek weld versus a chin weld. It did. Added length of pull was nice as well. Pad is adjustable left and right as well as up and down. This stock incorporates a set screw that tightens the stock to a milspec buffer tube and lets it work on a commercial tube as well. That's my only gripe. If you tighten the screw tight enough to take up the wobble on the milspec buffer tube the stock no longer slides. I cured the problem by laying a strip of .010 pipe wrap tape down the top center of the tube. Now the stock fits with no wobble and it slides on the buffer tube just fine.