1791 Industries LiteRaider Magnite M-LOK Picatinny Rail Section. The lightest metal M-Lok rail section on the market. Made from Metal Matrix Composite that is 33% lighter than standard 6061-T6 aluminum, yet just as strong. These rail sections drastically reduce weight while enhancing durability. With superior vibration-dampening properties, they protect your optics and accessories from harmfu.