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The Luth-AR MBA-5 Buttstock Assembly is the kind of upgrade that punches well above its price. Molded from high-strength glass-filled nylon, it keeps things light without feeling flimsy, and the paddle-style adjustment lever lets you drop or extend the length of pull in a hurry. Length of pull runs from 11.5 inches collapsed to 14.5 inches extended, so you can dial in a comfortable fit whether you're running a heavy jacket or a t-shirt at the range. Randy Luth's crew designed this one as the latest in their MBA series, and it shows in the details.
The wide, flared cheek rest is the star here. It gives you a broad, repeatable surface to plant your face against, which helps you get behind your optic or irons the same way shot after shot. Keep in mind the cheek rest is a fixed, non-adjustable design, so if you're chasing vertical cheek height for a tall optic setup, the MBA-3 or MBA-4 with a cheek rest assembly is the way to go. For most standard builds though, the MBA-5 lands right where you want it.
One feature owners consistently appreciate is the anti-rattle set screw, an exclusive touch on Luth-AR stocks. Slide the MBA-5 onto a smaller-diameter mil-spec tube and you can snug up the set screw with a 3/32-inch Allen wrench until it kisses the buffer tube, taking out that annoying wobble. It's not meant to lock the stock in place, just to tune the fit, so go easy and stop once the play is gone. The stock works with both mil-spec and commercial carbine buffer tubes.
An integrated Picatinny rail on the underside lets you clamp on a rear monopod or small accessory when you need a stable rested position. The MBA-5 is also Grovtec quick-detach sling cup ready, and it pairs naturally with Luth-AR's Chubby Grip and Palm Handguard if you're outfitting a rifle from the ground up. The Flat Dark Earth finish gives it a clean, earthy look that plays well with tan and multicam builds.
The MBA-5 requires a carbine-length buffer tube and works with either mil-spec or commercial diameter. It does not come with a buffer tube, so you'll want one already installed on your lower or picked up separately. Commercial tubes run slightly larger in diameter than mil-spec.
No, the flared cheek rest on the MBA-5 is a fixed, non-adjustable design. It gives you a wide, consistent surface for a solid cheek weld, but it won't raise or lower for a taller optic setup. If you need vertical cheek height, Luth-AR's MBA-3 or an MBA-4 with a cheek rest assembly is the better route.
When you mount the MBA-5 on a smaller mil-spec buffer tube, you can use a 3/32-inch Allen wrench to turn the set screw on the left side until it contacts the tube and removes the wobble. It's there to tune the fit, not to lock the stock in position, so tighten it just enough to take out the play. Users who noticed a little movement out of the box report it snugs right up once dialed in.
Yes on both. The MBA-5 is Grovtec quick-detach sling cup ready with molded pockets for self-threading QD cups, though the sling hardware is sold separately to keep the base cost down. The integrated Picatinny rail on the bottom lets you clamp on a rear monopod or other small accessory.
| UPC | 812058030874 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MBA-5F |
| Color | Flat Dark Earth |
| Model | |
| Product Type | Mil-Spec |
| Style | Collapsible |
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