The Luth-Ar MBA-1 buttstock with .223/5.56 buffer assembly is a complete, ready-to-install fixed stock solution for AR-15 builds running .223 Remington or 5.56 NATO. Built around an A2-pattern buffer system, the MBA-1 arrives as a full kit—buttstock, extension tube, standard buffer, and caliber-matched spring—so you're not hunting down parts across multiple suppliers. If you're building or upgrading an AR lower and want a lightweight, practical buttstock without the premium price tag, this is a no-nonsense choice.
What sets the MBA-1 apart is its adjustability. Length-of-pull and cheek rise both dial in to fit your frame and shooting position, which matters whether you're running a carbine at the range, hunting in layers, or setting up a duty rifle. The modular design means you're not locked into one configuration—tweak it as your kit evolves. The Flat Dark Earth (FDE) finish blends naturally with most modern builds and holds up to field use.
Sling attachment flexibility is built in: molded pockets on the buttstock accommodate Grovtec QD cups (sold separately), and a rail attachment option is available for those who want accessory real estate. It's the kind of practical thinking that separates a good stock from a frustrating one. Assemble it once, dial it in, and move on to actually shooting.
Key Features
- Complete buffer assembly kit—no parts hunting required
- Adjustable length-of-pull and cheek rise for custom fit
- Lightweight design keeps your AR nimble
- Modular configuration adapts as your build evolves
- Molded QD cup pockets for quick-detach sling systems
- Rail attachment option available for added versatility
- Flat Dark Earth finish for modern aesthetics and durability
Specifications
| Brand | Luth-Ar |
| Model | MBA-1 |
| Buttstock Type | Fixed, A2-pattern |
| Caliber | .223 Remington / 5.56 NATO |
| Buffer System | A2 extension tube, standard buffer, matched spring included |
| Adjustments | Length-of-pull, cheek rise |
| Color | Flat Dark Earth (FDE) |
| Sling Attachment | Molded QD cup pockets, rail attachment available |
Frequently Asked Questions
What's included in the MBA-1 kit?
The MBA-1 comes complete with the buttstock itself, an A2 extension tube, a standard buffer, and a .223/5.56 buffer spring. It's a full assembly ready to install on your AR-15 lower.
Can I adjust the fit to my body?
Yes. The MBA-1 features adjustable length-of-pull and adjustable cheek rise, so you can customize both for your frame and shooting style.
Will Grovtec QD cups fit the buttstock?
The buttstock has molded pockets designed to accept Grovtec QD cups, though they are sold separately. A rail attachment option is also available if you prefer other mounting solutions.
Is the MBA-1 designed for .223/5.56 rifles only?
Yes. The kit includes a buffer and spring matched for .223 Remington and 5.56 NATO—it's configured specifically for those calibers.
