Don't think there are any...most are calibrated for 7,62x39, 7,62x54r or 5,45x39.
Perhaps now that some of the former WP countries are joining NATO 5,56 mm calibrated optics will be made. But it would be my quess the would take 5,45 calibrated optics and issue those. (1p29/UPO1, PO 3.5x21)