HK 556 M-Lok Rail System 13.75″ Brown Anodized


In stock

SKU: HKRM5-130 Category:


The KDG HK 556 M-Lok rails are direct mount rail system, replacing the factory HK 556 rail systems. These rails are identical in design to their big brother, the KDG HK 762 M-LOK Rail system. Like the 762 version, these rails are lighter, longer, and more ergonomic for the operator.


The KDG HK 556s M-Lok rails come in two lengths: 10” and 13.75”. They feature a continuous monolithic picatinny rail at the 12 o’clock position, and M-Lok mounting slots at the 3, 6 and 9 o’clock positions.   The systems also uniquely offers a forward mounting M-Lok slot at each of the 2, 4, 8, and 10 o’clock positions for offset accessories like lights and lasers.  They also include two quick-detach sling attachment points on either side of the rail system for use with modern two-point adjustable slings. The KDG HK 556 rails will be available in black and brown type 3 hard coat anodizing.


The systems are optimized for all standard M-Lok mounted accessories, or could be used in combination with the KDG Kinect M-Lok quick attach/detach accessory mounts.   The KDG HK 556 M-Lok rail is compatible with Heckler and Koch 416 variants including: 416, MR 556, and M27.





Material – 6061-T6 Aluminum

Finish – Type 3 Hard-coat Anodized Brown

Weight: 13.6 ounces

Additional information

Weight 10 oz


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