The super modular rail (SMR) HK416 MK15 M-LOK is an advanced upgrade for the HK416 and MR556 weapon platforms, designed to enhance performance and versatility. It integrates seamlessly with the stock HK barrel nut, showcasing the renowned strength, rigidity and modularity of Geissele products. Constructed from high-grade 6061-T6 aluminum and finished with a military-grade type 3 hardcoat anodize, it is built to withstand combat conditions and meet stringent military specifications. The rail system features M-LOK bipoding slots at the 3, 6 and 9 O'clock positions for diverse accessory attachments. A full-length picatinny rail on top, along with shortened picatinny sections on the forend, provides ample space for optics, sights and tactical enhancements. Developed with feedback from elite warfighters, the Geissele SMR HK416 MK15 meets high standards of performance and functionality, offering unparalleled reliability and adaptability for field or range use. M-LOK mounting points are positioned at the 3, 6 and 9 o'clock orientations 12 o'clock picatinny rail