on bethesdas fb page there is artwork with a blue i want to say space suit thing and new gun any body know what this is

Well, it's just concept art.. So, it's a concept that's not actually in the game probably? I mean it basically looks like the vault suit as a hazmat suit. We can't carry guns on our backs so no telling what that's supposed to be. Sort of looks like a flamer concept.

yeah just like the M1 in the lone wanderer live action ad, it's done with creative freedom not necessarily showing us something in game

If your talking about the image at the top of Bethesda's FB page, the suit the man and woman are wearing are Vault suits. The man is holding a Laser Pistol, and the woman is holding a 10mm Pistol.