So, you want to institute a system where the weak and elderly are at the mercy of the strong, the lone are at the mercy of the gang. You want to give violent criminals a government guarantee that citizens are disarmed.Worth repeating.
I would add: "...where women are at the mercy of rapists and perverts..." This tends to bring in the women's votes, being a sort of feminist issue. The "equalizer" argument really works well here.