With respect to firearms manufactured or imported into the Union on or after ... [15 months after the date of entry into force of this Amending Directive], Member States shall ensure that any such firearm, or any essential component, placed on the market has been:
(a) provided with a clear, permanent and unique marking without delay after manufacture and at the latest before its placement on the market, or without delay after importation into the Union;
and
(b) registered in compliance with this Directive without delay after manufacture and at the latest before its placement on the market, or without delay after importation into the Union.
In meinen Augen sind sämtliche sich momentan in Österreich im Umlauf befindlichen Komponenten daher nicht von dieser Bestimmung erfasst (da sie ja nicht erst im Jahr 2018 hergestellt oder importiert werden).