Guns kill. Just like drugs the possession of which is against the law.
If a drug taken as intended can kill, a person has to have a prescription for it.
It's no more trouble to make possession of certain guns illegal than it is to make possession of certain drugs illegal.
The reason everyone is so interested in limiting guns and gun possession now is the number of shootings of innocent people that are taking place and that are increasing.
People who love guns and shooting for sport have a certain limited time to insure among themselves that the killing stops. If they can't stop the killing without all these laws and regulations, then the public sentiment will demand that the guns and possession of guns be very limited. If the regulation seems too difficult to put into practice, it may mean a constitutional amendment that outlaws private ownership of guns altogether.
The point is: the killing must stop.
If gun owners want to keep their guns, then they should as a group propose a way to stop the killing.