Geissele Automatics 05286S: The Super Modular Rail (SMR) MK8 M-LOK is Geisseles ultra-modular model. The SMR MK8 is one of the first rails available to utilize the Magpul M-LOK technology. These rails are designed to give the user full modularity while maintaining a strong and rigid platform. Maximum venting at the lower 45 quadrants create maximum heat dissipation and also dramatically reduces the rail\'s overall weight. Utilizing Magpul\'s M-LOK technology at the 3, 6, and 9 o\'clock positions, as well as the upper 45 quadrants. The SMR MK8 is both versatile and modular, allowing the user to tailor their platform to his or her unique needs.