Fred, check around for a handguard clip with the two rivets as I do not think they were manufactured without the clip to hold it to the barrel. You should be able to find something close.
Can not tell from your muzzle photos but there is a special stacking swivel that is unique to the rod bayonet rifles onlyAttachment 54840Attachment 54838Attachment 54839
Bottom right stacking swivel is for the rod bayonet rifle