Luth AR MBA 5F Carbine Stock Fits AR 15 AR 10 Flat Dark Earth MBA 5F LUTHMBA 5F UPC 812058030874
Product Description
The Luth-AR® MBA-5F™ Modular Carbine Buttstock in Flat Dark Earth (SKU: MBA-5F / UPC: 812058030874) bridges the gap between lightweight tactical carbine stocks and dedicated precision rifle buttstocks. Engineered by Randy Luth for AR-15 and AR-10 builders who demand rock-solid cheek weld stability without the bulk or weight of a full chassis stock, the MBA-5F tips the scales at a featherweight 8.95 ounces while delivering an adjustable 11.5-inch to 14.5-inch length of pull.
Molded in the USA from super-strong glass-filled nylon polymer in Flat Dark Earth, the MBA-5F shrugs off field impacts, extreme temperatures, and harsh solvents. Its universal internal channel accommodates both Mil-Spec (1.148-inch OD) and Commercial-Spec (1.168-inch OD) 6-position carbine buffer tubes, while Luth-AR's integrated Anti-Rattle set-screw tensioning mechanism locks out the annoying slop and play common to standard telescoping carbine stocks. A wide, flared fixed comb provides a comfortable, repeatable cheek weld behind LPVOs, red dots, and magnified optics.
Designed for rapid field adaptability, the MBA-5F incorporates an oversized paddle-style adjustment lever for effortless single-handed length-of-pull changes and a textured rubber recoil pad that anchors the rifle firmly into the shoulder pocket or plate carrier. Along the bottom toe, an integrated MIL-STD-1913 Picatinny rail allows direct attachment of rear monopods or rear bag riders, complemented by multiple Web sling slots and molded GrovTec QD sling cup pockets for versatile carry configurations.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Fits all AR-15, M4, and AR-10 / LR-308 rifles equipped with a 6-position Mil-Spec (1.148" OD) or Commercial (1.168" OD) carbine buffer tube. CRITICAL ARMORER NOTE: Will NOT fit A2 fixed rifle buffer tubes or non-notched pistol buffer tubes. The MBA-5F features a fixed flared cheek rest and does NOT accept the vertical MBA-4 cheek piece kit. For push-button QD sling swivels, install Luth-AR / GrovTec threaded QD cup inserts (SKU: GT-CUP, sold separately) into the molded side pockets.
- Ensure the host rifle is completely clear, magazine removed, and chamber visually and physically verified empty before beginning buttstock installation.
- Back out the anti-rattle tensioning set screw on the Luth-AR MBA-5F body so it does not obstruct the internal buffer tube channel during installation.
- Pull down firmly and evenly on both sides of the split paddle adjustment lever (pulling past the normal adjustment stop to fully retract the internal locking pin) and slide the MBA-5F forward onto your carbine buffer tube.
- Release the paddle lever and cycle the stock through all 6 buffer tube detent positions to verify positive pin lockup at your preferred 11.5" to 14.5" length of pull.
- Once set at your primary shooting position on a Mil-Spec buffer tube, snug the integrated anti-rattle set screw just enough to eliminate rotational play without binding rapid emergency length-of-pull adjustments.
Key Features
- Dual-Spec Buffer Tube Compatibility: Engineered to fit both Mil-Spec (1.148") and Commercial (1.168") 6-position carbine receiver extensions on AR-15 and AR-10 platforms.
- Integrated Anti-Rattle Clamp System: Built-in tensioning set screw eliminates upper-to-buffer-tube wobble for a solid, fixed-stock feel on Mil-Spec tubes.
- Flared Cheek Rest & Non-Slip Buttpad: Wide contoured comb enhances optical alignment, while the textured rubber buttpad mitigates felt recoil and shoulder slip.
- Integrated 6 O'Clock Picatinny Rail: Molded lower Picatinny rail section accepts precision rear monopods or bag riders for prone and benchrest stability.
- Lightweight Glass-Filled Nylon Construction: Weighs only 8.95 ounces and features a rapid paddle adjustment lever, sling slots, and GrovTec™ QD cup pockets.
Product Specifications
- Brand: Luth-AR®
- Model/Series: MBA-5™ Modular Buttstock Assembly (MBA-5F)
- MPN / SKU: MBA-5F / MBA5F
- Distributor SKU: LUTHMBA-5F
- UPC: 812058030874
- Platform Compatibility: AR-15 / AR-10 (Mil-Spec & Commercial Carbine Buffer Tubes)
- Length of Pull (LOP): 11.5 in (Collapsed) – 14.5 in (Extended)
- Material: High-Strength Glass-Reinforced Nylon w/ Rubber Buttpad
- Accessory Interface: Integrated Bottom Picatinny Rail & GrovTec™ QD Cup Ready
- Finish / Color: Flat Dark Earth (FDE)
- Country of Origin: USA
