With Fence Sitters
I just ask them to come up with the "ultimate" gun law that would remove all the violence and murders, suicides, etc.. in the World. The exception is they cannot just say or write, "ban all guns".
Then, when they come up with their ultimate law, rip holes in it
. Which, is easy to do because they don't take into account Criminals, Knowledge (to make guns and ammo), alternative weapons such as knives, hammers, axes, bats, even hands and feet (not to mention teeth, rope, car exhaust).
Some of them really start to think. Their biggest "fact" is that guns make it easier and more permanent to murder, commit suicide, "reach out and touch" someone from a greater distance. I tell them that the criminals will always have or get guns, look at the UK right now, so the tool may make it easier for them to commit their crimes, but it also allows meself and others to protect themselves at the same distance.
With die hards, you can't get through to them because, as in suicide, it's in the mind and you can't regulate a persons mind. To the die hard, it's the extreme fear of guns, either because they fear their own self and what they may do or just the fear of the tool itself. It's a mental illness and only a professional and meds can help that problem.
Also, people LOVE to be "dared". Dare them to go to the range and fire a .22 rifle and pistol (normal configuaration) and then bring out your "evil" 10/22 with the pistol grip stock and ask them what the difference is between the "normal" 10/22 that they had just fired and enjoyed and the now "evil" 10/22 that you have in your hands. They then realize that it's the same gun, just prettier
(the evil black one that is). After a couple of range sessions, with different calibers, in both the original configuaration and in the "evil" config. they just start looking at guns as a tool, just some are in the Kia mode (basic) and others are built into a BMW mode (the adding of cosmestics to make it look better).
Wayne