The Luth-AR MBA-1 rifle buttstock is a fully adjustable, modular replacement stock designed for AR-15 and AR-10 rifles running standard A2 buffer tubes. If you're building or upgrading an AR and want to dial in your cheek weld and length of pull without committing to a fixed position, the MBA-1 delivers genuine adjustability in a package that weighs just 1.26 pounds—roughly half what you'll find in many competitor adjustable stocks. It's the kind of no-nonsense upgrade that makes your rifle fit you better, not the other way around.

The MBA-1's cheek rest moves both vertically and fore-aft, so you can find the exact sight line that works for your optic and shooting style. The buttplate itself extends to give you an additional 1 1/16 inches of length-of-pull adjustment, critical if you're running a heavy winter coat, body armor, or just prefer a longer reach to the trigger. The stock is molded from glass-filled nylon—tough material that stands up to hard use—and installation is straightforward: it uses your existing A2 buffer tube and ships with the A1 buttstock screw needed to secure it. The castle nut and lock ring are integrated into the design, streamlining assembly and reducing loose parts.

Ambidextrous by nature, the MBA-1 works equally well for right- or left-shoulder shooters. The cheek piece comes pre-installed on the right side but can be repositioned to the left if you're a south-paw or want to run it that way. This stock fits standard .223/5.56 AR-15s and most .308/7.62 AR-10 rifles—verify your buffer tube type before ordering. Note: the MBA-1 is not compatible with carbine-length collapsible (6-position) tubes; if you run a telescoping stock, you'll want the MBA-3 or MBA-4 instead.