Designed for use with all M-LOK compatible hand guards and forends, M-LOK aluminum rail sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. The rail section also includes a QD swivel port. Machined from milspec-anodized aluminum. Includes all hardware (screws and M-Lok Cammed T-nuts) necessary for attachment directly to M-LOK slots on either aluminum or polymer hand guards and forends. Specs.: 4 Slots, QD swivel port. Length: 2.5″. Made in the USA.