The Luth-AR Modular Buttstock Assembly (MBA) for AR style carbines is designed to replace the standard buttstock on your AR. The MBA-4 is designed to work with a 6-position Mil-Spec or Commercial buffer tube. The MBA-4 is a direct replacement a standard adjustable carbine buttstock without additional Length-of-Pull or Cheek rise in a low-cost, lightweight, strong and high-quality design.

The MBA-4 requires a Carbine buffer tube, either Mil-Spec or Commercial. This stock works with both carbine Commercial and Mil-Spec tubes/assemblies.

The MBA-4 also features an anti-rattle set screw. The modular design of the MBA Buttstock allows you to configure your buttstock to your specific and personal needs. The MBA features multiple attachment points for a sling, including molded pockets that will accept Grovtec QD cups, sold separately.

• Lightweight buttstock for the carbine AR, weighing in at 9.5 ounces
• Picatinny Rail
• Revolutionary Anti-Rattle Set Screw
• Easy to add our Cheek Piece: Cheek piece will add an additional 1″ height on cheek rest
• Easy to add our Butt Plate Assembly or 3-Axis Butt Plate Assembly: The assemblies will add an additional 1 1/16″ length of pull with extended length buttplate
• Adapts To Existing Commercial and Mil-Spec Buffer Tubes
• Certain after Market Commercial Buffer Tubes that exceed 1.1172″ diameter may not fit
• Caution: the MBA-3 and MBA-4 Carbine buttstocks are not designed to be used with Large Bore Calibers such as .338 Lapua or .50 BMG applications. See theMBA-1 and MBA-2 Rifle buttstocks as alternatives
• The MBA-4 Carbine buttstock is NOT interchangeable with A2 standard buffer tube. You will need to purchase an MBA-1 or MBA-2 Rifle buttstock to fit A2 tubes

If you’re looking for a lightweight polymer skeleton stock, the carbine Skullaton stock from Luth-AR is a great option!