That's an old, 3rd at most Goblin stonethrower. I think it was called the Man-Mangler, but I could be wrong.
Can't tell with that dwarf, photo isn't clear enough, but it's not like any version of the White Dwarf minis I have, and I have most of the early ones. It's got a solid base rather than slotta, so it's old if it's GW. I have a solid based WD mini that came with an adventurers set, and it's not that one.