The Luth-AR MBA-1 buttstock with .308/7.62 buffer assembly is a complete, drop-in solution for builders and shooters who want a properly fitted, adjustable rear assembly on an AR-platform rifle in intermediate cartridges. This fixed buttstock kit comes fully assembled with everything needed to install a functional A2-style buffer system on a .308 or 7.62×51 AR lower — no hunting through a parts bin or guessing which components work together. If you're building a precision rifle, a hunting AR, or just want to dial in your ergonomics, having genuine adjustability in Length-of-Pull and Cheek Rise at the buttstock makes a real difference in comfort and consistency from the bench to the field.
The MBA-1's modular design means you're not locked into one configuration. Adjust Length-of-Pull to fit your torso length and gear, and dial Cheek Rise to get your dominant eye behind an optic or iron sights with a natural, repeatable sight picture. The flat dark earth finish is durable and blends with most modern tactical builds or hunting rigs. The buttstock includes molded attachment points for slings and is compatible with Grovtec QD cups (sold separately) if you want quick-detach capability, plus a rail attachment option for additional mounting flexibility.
Because this kit includes the A2 extension tube, standard buffer, and .308/7.62-rated buffer spring, you're getting matched, tested components engineered to work together — not a guessing game about spring rates or tube compatibility. Swap out the rear half of your rifle with confidence that recoil management and function will be solid, whether you're running suppressed or unsuppressed.
Key Features
- Adjustable Length-of-Pull for custom fit
- Adjustable Cheek Rise for optic and sight alignment
- Complete A2 buffer system included: extension tube, standard buffer, and .308/7.62 buffer spring
- Molded pockets compatible with Grovtec QD cups for quick-detach sling mounting
- Modular design for customizable configuration
- Flat Dark Earth finish
- Lightweight construction
- Rail attachment option available
Specifications
| Product Name | MBA-1 Buttstock with .308/7.62 Buffer Assembly |
| Brand | Luth-AR |
| Color | Flat Dark Earth (FDE) |
| Cartridge Compatibility | .308 Winchester / 7.62×51 NATO |
| Buffer System Type | A2 Style |
| Included Components | MBA-1 Buttstock, A2 Extension Tube, Standard Buffer, .308/7.62 Buffer Spring |
| Buttstock Type | Fixed |
| Sling Attachment | Molded pockets (Grovtec QD compatible) |
Frequently Asked Questions
Will the MBA-1 work on my .308 AR lower?
Yes. This kit is designed specifically for .308 and 7.62×51 NATO AR platform rifles. It includes a .308/7.62-rated buffer spring and standard buffer sized for intermediate cartridge recoil impulses.
What's included in the kit?
The MBA-1 comes complete with the buttstock itself, an A2 extension tube, a standard buffer, and a .308/7.62 buffer spring. You have everything needed to install a functioning rear assembly on your AR lower.
Can I adjust the fit?
Yes. The MBA-1 features adjustable Length-of-Pull so you can set the distance from the grip to the rear of the buttstock to match your proportions, and adjustable Cheek Rise to align your eye with your optic or sights.
Does it support quick-detach slings?
The buttstock includes molded pockets designed to accept Grovtec QD cups, which are sold separately. You can also attach a sling using the other molded attachment points on the buttstock.
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