Not really sure. Some of the commercials showed Judy using a tranq dart pistol, yet the closest thing to a weapon she carried in the actual movie was a can of mace and the closest she came to using it was unbuttoning the pouch it was in a couple of times. If they do use actual firearms, you have to consider the logistics of making them for different-sized shooters ranging from shrews all the way up to elephants. That being said, I can just picture an elephant or rhino chasing after poachers with an AK-47 eager to get a little payback.