I was going to say something about how they shouldn't have Adamantium claws, but then I remembered the Xenomorphs aren't actually organic, they just imitate genetic factors of organic hosts. It's entirely possible that some amount of Adamantium flowing through Wolverine's blood or chemically freed up by enzymes, or acid, or his healing factor would be integrated into the larval Xenomorph and replicated. Even if it was full Adamantium, metal claws and spikes would be very possible.That healing factor though...just turns all of them into reusable acid bombs. Scary ideas. Still, Ripley's got this. And Logan too, I guess.