First of all, an M43 with grommets is a big red flag. Although not impossible, you very, very rarely see authentic caps with them. Add the fact that thousands of repro M43's have grommets and you already have a potential problem with this one.
Another possibility is that this is a genuine Army M42 cap with added peak and then the SS trap insignia added sometime post war. By the way, it looks real, the trap I mean.
An interior photo would confirm but I would say that the cap is not real based on these photos.
Regards
Ben