The super modular rail (SMR) HK416 MK15 M-LOK is a cutting-edge upgrade designed to enhance the performance and versatility of the HK416 and MR556 weapon platforms. Engineered to seamlessly integrate with the stock HK barrel nut, this rail system exemplifies the renowned strength, rigidity and modularity that Geissele products are known for. Constructed from high-grade 6061-T6 aluminum and finished with a military-grade type 3 hardcoat anodize, the SMR HK416 MK15 is built to withstand the rigors of combat and meet stringent military specifications. This advanced rail system features M-LOK bipoding slots strategically positioned at the 3, 6 and 9 O'clock positions, allowing for a wide array of accessory attachments to suit any operational need. Additionally, a full-length picatinny rail runs along the top, complemented by shortened picatinny sections on the forend, providing ample space for optics, sights and other tactical enhancements. The development of the Geissele SMR HK416 MK15 was heavily influenced by feedback from our Nation's elite warfighters, ensuring that it meets the highest standards of performance and functionality. Whether in the field or on the range, this rail system delivers unparalleled reliability and adaptability, making it the trusted choice for those who demand the best in their equipment.M-LOK mounting points are positioned at the 3, 6 and 9 o'clock orientations12 o'clock picatinny rail