Which is more dangerous: a ton of raw Uranium ore, or a gun?

In the U.S. anyway, most people have the right to own a gun, by law. In contrast, virtually no one has the right to own a ton of Uranium ore, again, by law. In fact, no one is allowed to own more than a few pounds of Uranium ore. Now, on the surface anyway, this would suggest that guns are relatively safe things to have around, while a ton of Uranium ore is very dangerous indeed. But, is this really the case? Guns are basically killing machines. A ton of raw Uranium ore isn't much different from a Uranium mine, and, I haven't noticed Uranium mines killing anyone lately, unless it was by the collapse of the mine itself, which doesn't really have much to do with any particular properties of Uranium ore itself, does it? Raw Uranium ore is only moderately radioactive, and moderate exposure to raw Uranium ore is unlikely to have any particular negative effects. This is correct, isn't it? And, I believe that the radioactivity of raw Uranium ore is sufficiently low that it would actually require several tons of this material to achieve critical mass, or a sustained chain reaction. Or, even if a chain reaction was achieved, the power output would be so low as to be insignificant. So, why exactly is it highly illegal to possess a ton of raw Uranium ore? Am I missing something? Perhaps raw Uranium ore is more dangerous than I think it is?