Geissele Picatinny Rail for M-Lok 5 Slots Black. These high-quality M-LOK rail sections are precision machined out of 7075-T6 and Type-3 Hardcoat Anodized for extra durability. Available in 3 5 and 7 lugs and adhering to MIL-STD 1913 Picatinny specs these M-LOK Rail Sections ensure optimal modularity for your rail system. Specifications for Geissele Picatinny M-Lok Rails: Manufacturer: Geissele Color: Black Finish: Type-3 Hardcoat Anodized Fabric/Material: 7075-T6 Aluminium Gun Rail: Picatinny Country of Origin: USA Package Contents: Geissele Picatinny M-Lok Rails Geissele 08-194B: Picatinny Rail for M-Lok 5 Slots Black