There is a list by a reddit user here. However I believe these names were obtained through the names of audio files in the game. Files are often left in games unused so take this with a pinch of salt, also some of them also appear to be duplicates such as L86 A2 and L86 LSW.

I have not seen any of those at all during the beta

Hmm, I'll whip up an unconfirmed marking when I get up in the morning and start slapping it around then. 

Yeah that's what I was thinking or the other idea being to request a Unconfirmed namespace.

I am not familiar with custom namespaces or how they would be used, so I don't know if that is a better solution or not. In the meantime I've added a notice called Template:Unconfirmed that will also add all the pages to the category Category:Unconfirmed Content. At the very least seeing as we would have to request the namespace from wikia staff this should give us a list of articles that need to move initially.

Yeah that's fine the only advantage of a namepace is that it can be set up so the pages do not show up in the search and on release of confirmed the page can just be moved into the main namepace. We already have the prerelease template as well so pages will only need the unconfirmed or prerelease tag or the page will be too cluttered.

The MK17 SR (also known as the Mk17 Mod 0), I believe, was only used during the demo and has since been renamed to the SCAR-H to the best of my knowledge (They're the same weapon, regardless). But they could always include it as a higher end rifle?