DEMO Kinetic Development Group KDG HK 556 M-LOK Rail System 10 in Aluminum Black Finish. The rail offers a more ergonomic m-lok rail system that is also lighter and longer than HKs standard rail. The profile of the KDG rail allows for maximum ergonomics for the operator. M-lok attachment slots not only offer improved modularity but added weight savings over Picatinny. The KDG HK 556 rail comes in two lengths 10 and 14. It features a continuous monolithic picatinny rail at the 12 oclock position and m-lok mounting slots at the 3 6 and 9 oclock positions. The system also uniquely offers a forward mounting slot at each of the 2 4 8 and 10 oclock positions for offset accessories like lights and lasers. The HK 556 MLOK also offers two quick-detach sling negative space sling attachment points on either side of rear of the rail system at the 2 and 10 oclock positions for use with modern two point adjustable shooting slings. The system attaches with a single headed slotted bolt allowing the rail to be removed in less than a minute allowing zeroed accessories to remain attached. On reinstallation of the system the accessories do not require re-zero to point of impact as it due to its ridged X Y Z and anti-rotation features. The system is optimized for all standard m-lok mounted accessories or could be used in combination with the KDG Kinect toolless quick attach/detach accessory mounts. The KDG HK 556 m-lok rail is compatible with all HK 556 variants to include: 416 MR556 & M27. Specifications for Kinetic Development Group KDG HK 556 M-LOK Rail System 10 in: Manufacturer: Kinetic Development Group Gun Make: Heckler & Koch Gun Rail: M-LOK Last Chance: Yes Fabric/Material: 6061-T6 Aluminum Length: 10 in Features of Kinetic Development Group KDG HK 556 M-LOK Rail System 10 in Works on all HK 416 MR556 and M27 10 in Length M-Lok modular system Package Contents: Kinetic Development Group KDG HK 556 M-LOK Rail System 10 in Kinetic Development Group HKRM5-020: KDG HK 556 M-LOK Rail System 10 in Aluminum Black Finish