Heckler & Koch MR556 M-LOK 12.5" Handguard Black

The Heckler & Koch MR556 M-LOK 12.5" handguard replaces the factory rail system on your MR556 platform rifle, giving you a slimmer, lighter profile and modern accessory mounting options. Built for shooters who want a tactical rifle that handles fast and stays nimble—whether you're running drills at the range, setting up for precision work, or building a compact duty rifle. This black anodized handguard strips weight without sacrificing modularity, and the M-LOK slots let you dial in exactly the gear you need.

The 12.5-inch length gives you adequate real estate for lights, lasers, grips, and rail sections while keeping the overall package short enough to maneuver in tight spaces. A flat-top Picatinny rail running the top of the handguard preserves your optic mounting options and maintains a traditional shooting platform for those who prefer it. The M-LOK attachment system underneath and to the sides provides a cleaner, lighter alternative to full-length quad rails—less bulk, less leverage on your hands, and easier access to the barrel for cleaning and maintenance.

This is a direct fit for the MR556 platform and serves anyone upgrading from a stock setup to something more customizable. Whether you're a competitive shooter, a hunter looking to modernize an MSR, or someone building a practical AR-variant, this handguard delivers function without unnecessary complexity.

Key Features

• 12.5-inch length optimized for compact, maneuverable rifle builds
• Flat-top Picatinny rail on top for optic and accessory mounting
• M-LOK attachment points for lightweight, modular gear integration
• Black anodized finish for durability and a clean aesthetic
• Direct fit for Heckler & Koch MR556 rifles

Specifications

Frequently Asked Questions

Is this handguard compatible with my MR556?

Yes, this handguard is designed as a direct replacement for the MR556 platform.

What's the difference between M-LOK and Picatinny rail?

This handguard uses both: a Picatinny rail runs along the top for traditional optic and rail-mounted accessories, while M-LOK slots on the sides and bottom offer a lighter, more streamlined way to attach accessories like grips, lights, and rail sections.

Will this work with my existing scope and mounted accessories?

The top Picatinny rail will accept any standard Picatinny-mounted optic or rail. Accessories that use M-LOK will require compatible mounts. Existing quad-rail or other proprietary-mount gear may not be compatible without adapters.

How much does this handguard weigh compared to the factory rail?

The product record does not include weight specifications. Contact us for exact weight details if that's a critical factor for your build.