Luth-AR MBA-3 .308 Carbine Stock Kit with Mil-Spec Buffer Tube - Black

The Luth-AR MBA-3 carbine stock kit pairs the popular MBA-3 adjustable buttstock with a complete Mil-Spec .308 buffer assembly, giving AR-10 builders a turnkey shoulder-stock solution in a single package. The kit is centered on the MBA-3 Carbine Buttstock, injection molded from glass-filled nylon for rigidity and impact resistance at a weight of roughly 18.5 oz, and engineered to mount on any standard 6-position Mil-Spec or Commercial diameter carbine buffer tube.

The MBA-3's defining feature is its 3-Axis adjustable buttplate, which allows independent Length-of-Pull, height, and lateral adjustment, plus an adjustable cheek rise for proper comb height behind an optic. The stock is rated for both .223 Remington and .308 Winchester AR-pattern rifles, making it one of the most adaptable aftermarket designs available and well suited to AR-10 builds, modern precision .308 carbines, and lighter-recoiling 5.56 platforms alike.

This MBA-3K308M 308 Kit includes the .308-tuned buffer assembly needed to complete the install: a Mil-Spec diameter 6-position carbine buffer tube, a .308 buffer and matching .308 buffer spring, plus the latch plate and lock ring required to mount the assembly in a standard AR-10 lower. All hardware ships in black for a clean, uniform shoulder-stock look that matches the buttstock shell.

Whether you are assembling an AR-10 from the ground up, replacing a worn factory stock, or building a precision .308 carbine, the Luth-AR MBA-3 Stock Assembly 308 Kit delivers the buttstock, tube, buffer, spring, and mounting hardware in one matched package.