Maxim Defense Industries M-RAX M-Slot Mounting System 3.1" Picatinny Rail 6061-T6 Billet Aluminum Hard Coat Anodized Matte Black 2 Pack Maxim Defense Industries is excited to introduce the new M-RAX attachment which pairs specifically with the Maxim Defense hand guards. Unlike the traditional M-Slot mounting system the M-RAX utilizes the full slot of your rail maximizing space. The M-RAX system is end to end stackable allowing you to create a seemless monolithic rail sections where you might need them. The rail sections are made from 6061-T6 Billet Aluminum and they features a Hard Coat Anodized Matte Black finish. Maxim Defense M-RAX Rails Specifications and Features: Maxim Defense Industries MXM-47588 M-RAX Conversion Rail Converts Maxim M-Slot into MIL-STD-1913 Picatinny Uses 2 M-Slot Slots 3.145" Rail Length Overall Weight 1.54oz 6061-T6 Billet Aluminum Hard Coat Anodized Finish Matte Black 2 Pack Fits: Any Modular M-Slot Compatible Rail System