Also, I would like to point out that the blades that Slug shoots are larger than a car tire. It's also going extremely fast. I'm assuming it can cut through a knightmare, and it will cut through humans like butter (I don't care what type of armor, it'll still break your bones and organs if it doesn't cut you). I don't know if it will work against one of their shields, but I don't think the standard knightmare has those.

Also, wtf?! Where did they come from? Was it our evil universe alterer that tipped them off?