I have not read all the post's here, but...what I believe is this. buying back guns, and making them illegal for Responsible people to own or to get a CCP does 2 things imho. It takes away the possibility of a gun owner to protect his or her life against a deadly threat.
The second thing it does is arms the criminals, as they don't play by the Laws.
One thing that needs to be addressed is this. If you apply for a CCP, or you apply to buy a gun resulting in a background check, someone needs to look into the the Mental state of these people. Sane folks don not go around shooting people in schools, or publis places, i.e. malls, theaters ect. There needs to be a good way to check on peoples mental health, and this is where I believe all states fail for the most part.
Here in cali, L.A. to be more specific, the cops take illegal guns off criminals all the time, or find them when they do search warrants. Most if not all of these criminals are somewhat mentally challenged, and don't think twice about shooting someone in a crowded public place.
I still own guns. I shoot for fun. In the past I went to Jeff Coppers combat school, but never shot in competition. I also believe that in some circumstances being allowed to carry a weapon could save lives. A mentally unbalanced person goes into a restaurant, and starts shooting people, If someone had a CCP, they might be able to neutralize the person shooting thus saving innocent lives.
Places like NY, Cali and others states are doing an disservice to it's people by Not allowing CCP's. I know here in my state, if someone breaks into my house, I have specific laws that need to be met to use deadly force, which is stupid imho.
Mental, and criminal screening to purchase a weapon should paramount.