$124.97
5 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
The Luth-AR MBA-4 is one of those upgrades that quietly makes your rifle feel dialed in. It replaces your standard adjustable carbine buttstock and adds an adjustable cheek riser with up to an inch of height, which is exactly what you want when you're running an optic and chasing a clean sight picture. Built from glass-filled nylon, it comes in light at around 9.6 ounces and roughly 7.5 inches long, so it firms up your setup without loading down the back end of your rifle.
The headline feature here is that adjustable cheek rest. Getting your eye lined up naturally behind a scope or red dot makes a real difference in how fast and consistent you shoulder the gun, and the MBA-4 lets you fine-tune that weld instead of settling for whatever a basic stock gives you. It keeps the same modular DNA as the pricier MBA-3, just pared down to the essentials for folks who don't need the full three-axis adjustment.
This one drops onto both Commercial and Mil-Spec diameter carbine buffer tubes and works across AR-15 and AR-10 builds, covering .223/5.56 and most .308 carbine rifles. Length of pull adjusts through the six positions on your buffer tube, and an anti-rattle set screw snugs everything up to kill wobble, which is handy since Mil-Spec tubes tend to leave a touch more free play than Commercial ones. Worth knowing up front: it won't work on rifle-length A2 tubes, and a few oversized aftermarket tubes past about 1.17 inches can fit tight. Just remember to only snug the anti-rattle screw enough to remove play rather than cranking on it.
Installation is a no-tools, five-minute job for most builds. Owners running it on everything from AR-10 SPR setups to VR80 and VR-style shotguns consistently mention a snug, solid stock weld and a stock that stays out of the way when you're moving. It's a straightforward, budget-friendly way to add real ergonomics to a rifle without overcomplicating things.
Yes, the MBA-4 is designed to slide onto both Commercial and Mil-Spec diameter six-position carbine buffer tubes. Keep in mind that Commercial tubes run slightly larger, so you'll typically see a bit more free play on Mil-Spec tubes. That's what the anti-rattle set screw is for, snugging things up for a tight fit. It will not fit rifle-length A2 tubes.
The adjustable cheek rest gives you up to one inch of height adjustment. That range is plenty to line your eye up naturally behind most optics, whether you're running a magnified scope or a red dot on a taller mount. It's the main reason folks reach for this version over a plain carbine stock.
It does. The MBA-4 fits AR-15 and AR-10 platforms and is rated for all .223/5.56 and most .308 carbine-style rifles. Owners commonly run it on AR-10 builds like 18-inch SPR setups. Just make sure your rifle uses a carbine buffer tube, not a rifle-length A2 tube.
Not at all. It's a drop-in replacement that slides onto your existing carbine buffer tube with no special tools required, so most people have it swapped in a few minutes. Line up the notch on the lock pin with the tab on the stock body, then snug the anti-rattle screw just enough to remove any wobble without overtightening.
| UPC | 859819007027 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MBA-4-CHP |
| Color | Black |
| Model | |
| Product Type | Mil-Spec |
| Style | Adjustable |
You must be logged in to post a review.
Reviews
There are no reviews yet.