LAPD declares 'ghost guns' an 'epidemic.’
news.yahoo.com
news.yahoo.com
And it hasn't correlated with accelerated crime and intensity of such.
But the reason for that is largely to prevent the temptation for allowing the creation of things like the LAPD in the first place, with the universal popular militia as the force relied on when public authority needs armed enforcement.
Play authoritarian games [0], get authoritarian prizes.
[0] e.g., create standing domestic paramilitary forces to protect the elites from riffraff.