The AR-Stoner M-LOK Picatinny Rail Section provides an easy way to attach picatinny rail mounted accessories to a M-LOK handguard or forend. They are built from lightweight aluminum and available in multiple lengths so you always have just the right amount of rail. All mounting hardware is included. Features6061 Aluminum constructionType III Hard Coat AnodizedSmooth, rounded edgesEasily attaches to M-LOK hand guards