US Patent 9052157 Revolving rear sling mount for a firearm

In some embodiments, a revolving sling mount for a rifle (e.g. AR-15/M4/M16) includes a stack comprising a fixed plate configured to be secured to the rifle in a fixed position, a revolving sling-attachment plate rotatably attached to the fixed plate, and fixed ring securing the revolving sling-attachment plate between the fixed plate and stop ring. Each of the fixed plate, sling-attachment plate and stop ring defines an inner aperture sized to slide over a buttstock tube of the rifle. The revolving plate rotates relative to the fixed plate about an axis perpendicular to a major plane of the fixed plate. The revolving plate includes a sling-attachment loop for attaching a sling. One or more rotation stops constrain a rotation of the sling-attachment plate so that the sling-attachment loop does not obstruct the rearward motion of a charging handle assembly of the rifle.