The Sling Rail Mount is a quick detach swing swivel device that mounts to your rail allowing the addition of a sling. It is made of black anodized aircraft grade aluminum and mounts to all standard Weaver / Picatinny 1913 rails.Picatinny rail mount attaches a traditional sling stud for use with conventional slings. Features: Quick detach/swing swivel Mounts to all standard Weaver/Picatinny 1913 rails