Once you have armed weapons you can’t make sure only the ‘good guys’ have them. The trouble is that anyone with basic machine tools can make some pretty fancy

Once you have armed weapons you can’t make sure only the ‘good guys’ have them. The trouble is that anyone with basic machine tools can make some pretty fancy weapons, and the career criminals by definition will make them with impunity. Hence the saying that if you outlaw guns, only outlaws will have guns.