Warne® M-LOK rails are made from 6061 T6 aluminum and act as an interface to attach accessories to any M-LOK slots. The rail is Mil-Spec picatinny and will support any modern accessories such as lights lasers vertical grips etc. These rails are available in 3 5 and 7 slot versions. – Lightweight Aluminum – Ideal for accessory mounting – Designed and MADE IN USA