The Magpul MOE SL Handguard (brand part number MAG538-BLK) is a drop-in handguard built for AR-15/M4 rifles running a carbine-length gas system and an A2 front sight, finished in black polymer. Magpul molds it from reinforced, heat-resistant polymer to keep weight and cost down compared to an aluminum rail handguard, while an integral riveted aluminum heat shield protects your support hand from barrel heat. M-LOK slots at the 2, 6, and 10 o’clock positions let you add Picatinny rail sections or direct-attach M-LOK accessories for lights, slings, or grips wherever you need them. At 8.90 inches long, it installs using your rifle’s existing round front retaining cap and rear spring-loaded delta ring, with the factory sling swivel removed from the A2 front sight assembly if equipped.

Key Specifications

• Built for AR-15/M4 rifles with a carbine-length gas system and A2 front sight.
• M-LOK slots at the 2, 6, and 10 o’clock positions.
• Molded from reinforced, heat-resistant polymer.
• Includes an integral riveted aluminum heat shield.
• Large front extension and lower lip shield the hand from the hot front sight assembly.
• Installs with the existing round retaining cap and rear spring-loaded delta ring.
• Direct replacement for M4 Carbine-type plastic two-piece handguards.
• Not compatible with piston-operated AR platforms.
• Requires removing the factory sling swivel from the A2 front sight assembly if equipped.
• Measures approximately 8.90 inches long.

Frequently Asked Questions

Will this work on a piston AR? No, it’s not compatible with piston-operated AR platforms.

What retaining cap does this need? The existing round front retaining cap and rear spring-loaded delta ring.

How long is this handguard? Approximately 8.90 inches, sized for a carbine-length gas system.

Buy the Magpul MOE SL Carbine-Length M-LOK Handguard for AR-15/M4 – Black

Add real M-LOK accessory space without the weight or cost of aluminum. Order it from our Magpul Industries lineup, part of our AR handguards selection, at our Lubbock, Texas gun shop for fast, direct shipping.