The Magpul MOE SL Carbine-Length Handguard (brand part number MAG538-GRY) is a Gray polymer hand guard built for AR-15/M4 carbines running a carbine-length gas system. Magpul built the MOE SL line to replace the factory M4-type two-piece hand guard with a slim, lightweight design that adds M-LOK accessory slots without the weight or cost of an aluminum rail. Reinforced heat-resistant polymer and an integral riveted aluminum heat shield hold up under sustained firing, while a protective front lip guards the support hand near the muzzle end. It’s a direct, no-fuss upgrade for carbine-length AR builds finished in Gray.

Key Specifications

• Measures 8.9 inches long, sized specifically for carbine-length gas system AR-15/M4 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.
• A large front extension and lower lip shield the support hand from the hot front sight assembly.
• Installs using the existing round front hand guard retaining cap and rear spring-loaded delta ring.
• Requires the A2 front sight assembly with a round retaining cap; not compatible with rifles that use a triangular retaining cap.
• Not compatible with piston-operated AR platforms.
• Finished in Gray polymer for a color-matched build.
• Made in the USA by Magpul Industries.

Frequently Asked Questions

What gas system length is this built for? The carbine-length gas system, replacing standard M4-type two-piece hand guards.

Can I run this with a factory sling swivel? No, the factory sling swivel is not compatible and must be removed from the A2 front sight assembly.

Does it work with a piston-driven AR? No, this hand guard is not compatible with piston-operated platforms.

Buy the Magpul MOE SL Carbine-Length AR-15/M4 Handguard – Gray

Refresh a tired carbine-length hand guard with a slim, M-LOK-ready piece built to Magpul’s own tolerances. Order it from our Magpul Industries lineup, part of our AR handguards selection, at our Lubbock, Texas gun shop for fast, direct shipping.