I've gotten versions with it such as the one on the Sith Warrior legacy armor vender but is there a version like this one without the backpack? I haven't been able to find it on SWTORISTA if you can get it.
I want to preface this with I am a true Skitarii hoper. I've wanted them since I got into Darktide. I am not here to stamp on your hopes and dreams; they're my hopes and dreams too.
I only wish to point out that the leak from u/Southern_Soup_718 earlier today allegedly came from the Ukrainian localization files. Going to steam and clicking properties you'll be able to view all languages Darktide is officially playable in. Ukrainian is not one of them (unless it has one on Xbox I don't know about). Russian is, and there is a Ukrainian localization on Nexus for download (not official).
So, there are three things that could have happened here from what I could tell.
Yes, Admech of some sort is likely but please keep this in mind. This leak is not verifiable currently unless someone goes poking around in the files of the official existing localizations.
We don't need a Hive Scum clownfest again where we assume everything listed is coming and then it's revealed its Adept or Skitarii and their weapons don't match up.
EDIT: I had a someone I know who studies Eastern European languages ID the language in the leak, according to him and another Russian speaker in the comments this is Ukrainian, so as other have said, its either from a steam page leak, (which has Ukrainian localization) and will need to be verified as the leaked text doesn't fully match with Hive Scum and Arbites formatting, or is from the Fan translation on Nexus and thus suspect.