The Magpul MOE M-LOK Rifle-Length Handguard (brand part number MAG427-BLK) is a Black polymer hand guard measuring 12.5 inches long, built for AR-15/M16 rifles running rifle-length gas systems. Magpul Original Equipment (MOE) construction keeps the weight of a standard hand guard while adding M-LOK slots for modern accessory mounting. Reinforced, heat-resistant polymer with an integral riveted aluminum heat shield stands up to sustained firing, and unlike many hand guards built for direct impingement only, this one works with both direct impingement and most piston-driven gas systems. It’s a versatile, direct-fit replacement for a worn or damaged rifle-length hand guard, finished in Black.

Key Specifications

• Measures 12.5 inches long, sized specifically for rifle-length gas system AR-15/M16 rifles.
• Features M-LOK slots at the two, six, and ten o’clock positions for direct-attach lights, slings, and grips.
• Built from reinforced, heat-resistant polymer for durability without aluminum rail weight or cost.
• Includes an integral riveted aluminum heat shield for added protection against sustained-fire heat.
• Front extensions and a lower lip shield the support hand from the hot front sight assembly.
• Compatible with both direct impingement and most piston-driven gas systems.
• Installs using the existing delta ring and triangular or round front hand guard retaining cap.
• Includes a relieved area at the top rear that accommodates most overhanging optic mounts.
• Finished in Black polymer.

Frequently Asked Questions

Will this work with a piston-driven upper? Yes, it’s compatible with both direct impingement and most piston-driven gas systems.

Does it interfere with optic mounts? No, a relieved area at the top rear accommodates most overhanging optic mounts.

How long is this hand guard? It measures 12.5 inches, sized for rifle-length gas systems.

Buy the Magpul MOE M-LOK Rifle-Length AR-15/M16 Handguard – Black

Replace a worn rifle-length hand guard with a lightweight, M-LOK-ready piece that works across direct impingement and piston builds alike. Order it from our Magpul Industries lineup, part of our AR handguards selection, at our Lubbock, Texas gun shop for fast, direct shipping.