Wouldn't it be weird if it was able to do that? Think about it... those are two different universes, destiny and halo if you brought one of those jackal guns from the halo universe to the destiny one, the material in the gun and bullet wouldn't even exist. It would probably be some ultra powerful weapon since it could take down shields and all because no one has encountered that material before and wont know how to defend against it. Maybe halo and destiny have different laws of physics so it would ultimately destroy everything and probably the entire destiny universe. O.o