Wouldn't be just the poor.
The working middle class would also be economically limited to owning one or a small number of guns, and likely not rapid firing, high capacity semiautomatic assault style rifles which should cost several thousand dollars and be difficult and time consuming to obtain.
If you look at the whole picture overall, it's the lower economic classes in which the vast majority of gun violence occurs and which most of the victims are members of.
With the exception of rappers, you don't see people who make a lot of money running around capping each other.
Meanwhile, the Rich, with their little private armies, would take over small towns and, eventually, cities. Power to the Corporations! LOL