Well, we are not going to get rid of guns and we are not going to be free from evil and mental illness and alienation and lost souls. So where are we? Maybe we should tone down the equipment, limiting the ability of madness to commit mayhem with jet engines.
Magazines with less capacity -- I don't even know the number -- do not threaten my liberty nor do they corrupt the Second Amendment, written with a quill pen at a time when the equipment was a musket. Good and responsible gun owners are not interested in committing mayhem, anyway. They certainly don't need the capacity to kill as many people as possible as quickly as possible. Nor does evil.
Slippery slope? No. There are an estimated 300 million guns in America. They cannot and will not be taken. Nor should they be.
I need a car, up to and including a Ferrari, if I could afford one. But I don't need a jet engine bolted to it.
Somehow Joe sees it as analogous to relate a firearm magazine to a jet engine strapped to the roof of his house.