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LUTH-AR Modular AR-15 Stock Making Waves

Posted on April 15th, 2014 by ar15news

It’s not often you see new items hit the firearms market that are game changers, but innovation is brewing and changes are coming faster than ever.

It has been 50-plus years since the inception of Eugene Stoner’s M16 design, which wielded a fixed A1 stock. Since that time there have been very few innovations in the fixed stock offerings that have come to market. Perhaps the most significant fixed stock to date has been the Magpul PRS, which was the first fixed AR style stock to add adjustability for the shooters comfort, length of pull and cheek weld. For a decade the PRS has dominated the market and for good reason. Magpul makes a great product that has been time tested in battle. 

That is all about to change. I had never heard of LUTH-AR and for good reason, as of last year, they didn’t exist, nor did the MBA stock I am about to reveal to you.


The MBA (Modular Buttstock Assembly) is lighter, quicker and an easier to adjust stock that is high quality and less than half the price of the Magpul PRS. That is a big feat to accomplish by someone who is perceivably new to the AR market.

As you can see from the quick comparison, the MBA is the clear winner over the long time champion. 

Quick Look Comparison:


*Street price from

So who is LUTH-AR anyway?

LUTH-AR is Randy Luth and he is perhaps the Steve Jobs of the AR-15 industry. In 1986, Luth founded what is now one of the largest manufacturers in the AR-15 industry, DPMS!  Until 2007 when he sold the company to Cerberus/Freedom Group and remained President of DPMS Panther Arms. The former DPMS owner currently holds at least seven U.S. patents in the firearms industry. In addition he earned Rifle of the Year awards in 2005 from Shooting Illustrated and in 2006 from American Rifleman. In 2009, Luth was chosen as Outdoor Life “Readers’ Choice” Person of the Year. Luth is the current owner of Del-Tone/Luth Gun Club and in his spare time serves on the board of directors for USA Shooting Team. Mr. Luth is also an avid hunter and 3-gun competitor. 

I would say he is more than qualified to come to market with a design that simply kicks butt as he has most likely forgotten more than you or I will ever know.

“Most of the adjustable buttstock assemblies out there are complicated, cumbersome and add unnecessary weight to the AR,”Luth said. “I realized there was a niche for something lightweight and affordable that allows shooters to get the customized fit they need to enhance their shooting experience.”



The MBA stock is seemingly easy to install over a standard A1 or A2 receiver extension (buffer tube) and will work on any AR-15/AR-10 rifle that accepts a buffer tube. 

Made from Super Strong Glass Filled Nylon, the MBA is Fully Ambidextrous and can be comfortably used shooting off either shoulder as the cheek piece can be installed on either side for right or left hand shooters. In addition, the design allows the cheek weld to be moved forward or backward by adjusting the vertical pillars mounted to the holes than run the length of the stock. 


The cheek saddle allows for up to 1-inch of height adjustment and the butt-plate length has an adjustment of 1.125”. An optional rear sling swivel is available for an additional $4.

The MBA is currently available in two configurations, the MBA-1, which is the full-meal-deal package that includes everything you need for full adjustment or the MBA-2 “Skullaton” which is a skeletonized version of the MBA-1 with no adjustable pieces, however they can be added at a later time. The MBA-2 has an MSRP of $49.95.

At the range, the MBA stock performed flawlessly. The adjustment knobs which are made of steel held strong round after round on our 308 and 556 test guns including the DRD Tactical G762 rifle which is shown in these photos. 



I had a really good chat with Mr. Luth on the phone and I am very impressed by everything LUTH-AR has done so far and I eagerly look forward to seeing more in the near future. Randy did drop this little hint:

“We are working on a carbine version now and while it posses some challenges, we hope to have it done soon” Luth said. 

By the way, if you’re curious, the MBA is made right here in the United States, including the molds.


The Luth-AR MBA-1 and MBA-2 are currently available for purchase from Brownells, Rainier Arms or from Luth-AR directly. Interested dealers and wholesalers are currently being accepted and should contact Luth-AR directly. The official website is or email


About the Author:  Jody Lewis is a professional photographer based in the PNW who has articles published on many of the popular websites including RECOIL-WEB and Guns & Tactics Magazine. He is also the Director of Operations and Business Development for Defense Marketing Group. You can follow him on his page XFIREPIX on Facebook.

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