We are looking at and talking about 2 different HG85 hand grenades.
The Arges HG85 (Austrian) is this version:
https://www.lexpev.nl/grenades/europ.../splhgr85.html
The other version as discussed is the Swiss HG-85:
https://www.lexpev.nl/grenades/europ...g85uehg85.html
This Swiss version seems to be cast and the Austrian version is molded. They both have different specs and that is what was throwing my searches off.