We've seen it many times, in this nation, in specific states and cities, and in other nations.
First, "machine guns" (full auto weapons) are banned or severely restricted. Open carry is banned or restricted. Concealed carry is banned or restricted.
Registration is legislated. Next thing you know, you have to have a FOID renewed every five years for the privilege of keeping what you own... and since your guns are now registered you can't fudge, they'll come for you.
Then other kinds of firearms are banned or restricted... semi-autos, magazine capacity, handguns of certain sorts or all handguns... and since everything is registered, if it is banned you've now got to turn it in or they'll come for you...
Next thing you know, you're England and have to spend hundreds of dollars for licences and permissions to own a double-barrel shotty gun... and forget about anything more effective. Soon after that, self-defense becomes so restricted it is barely worth resisting criminals anymore...
We've seen variations on this theme in many nations, states and cities. California and New York come to mind, along with Chicago and DC...