Geissele's Super Modular Rail MK15 for HK416/MR556 platforms. 6061-T6 aluminum construction with Type 3 hardcoat anodize finish. 10.5" M-LOK compatible rail system.
The MK15 is a purpose-built rail system designed to upgrade HK416 and MR556 platforms with the modularity and rigidity Geissele is known for. This is not a universal rail—it's engineered specifically for your HK platform.
The factory HK rail works, but the MK15 gives you a modern, modular platform without replacing your barrel nut or requiring gunsmithing. You get the precision Geissele is famous for while maintaining full compatibility with your HK system.
Whether you're running a duty rifle, a precision build, or a tactical carbine, the MK15 delivers the modularity and durability you need.