New never used M16/M16A1 handguard slip ring with used slip ring spring and new never used slip ring retaining snap ring USGI Vietnam Era Military surplus - None of my parts that I list as USGI early Vietnam Era Military surplus or USGI Military surplus are reproductions all where purchased prior to the era when reproduction parts where being made (20-40 years ago) - Have 2 of these for $20.00 each