Does anyone know where I can get a barrel clamp for the Rossi R92 that has a sling mount on it? Or another way to get a sling mount on the forward position of the rifle?
Uncle Mikes makes a sling clamp that fits the magazine tube.
Or you could remove the plug at the end of the tube (1 screw) and carefully let the spring loose, drill a hole in the center of the plug and install a shotgun magazine cap swivel, you can get that from Unc Mike too.