As long as our unassimilated permanent underclass is armed then “middle America” will be as well; even with confiscation Americans would have the same sources of weapons as the urban underclass - and the issue of registration would be moot.
It is not nearly as much about who has access to weapons as who has *legitimate* access to weapons.
Guns are hard to confiscate. But they can be made “illigitimate” much easier.
Then they are used as just another lever for enforcement based on who the government wants to pressure or destroy.