The side sling swivel was originally developed for use with the M203 grenade launcher. The side sling swivel allows the use of tactical and Mil-Spec slings. The side sling swivel allows slings to be mounted out of the way of tactical lights, lasers and other weapon mounted accessories. Manufactured from black phoshphated steel. All hardware included. No permanent modification required. Easy installation onto all .750 mil-spec barrels with conventional front sight posts.