What does that look like in real life?
In real life it looks like A generational sea shift. It obviously can't happen overnight.
Social Morays and norms change over time... the tide is already headed that direction, changes implemented today would be designed to have far reaching effects, not overnight ones, though a gun buyback, trade your gun for an electric vehicle, could work rather quickly to get a lot of them off the street, we could do nothing , and simply the general growing public disgust with your ammo-sexual lifestyle will continue to have generational shaming effect, as it already plainly has..plenty of kids today have eschewed their parents disgusting ammosexual behavior in favor of a different, less frightened, less fretful, less “us vs them”, path, and have embraced a more inclusive, more Christ like path.
Of course this was all prophesied to happen.
The victory of the Peace of Christ and His gospel in the Christian age cannot be stopped. (Ephesians 3:21, Isaiah 9:7, Hebrews 11:6,32-33, Matthew 16:18-19, Revelation 14:6)
Guns are irrelevant and inconsequential to this prophesied victory.
If I am hiding the fact I own a weapon, because it is illegal for me to possess it - how do you get it from me?
I probably don't get it from you directly, but I first try with financial incentives, and if that doesn't work, I extend those incentives to your progeny and as a society I simply wait you out... you eventually tip over and your kid, grandkid or whatever eventually trades the gun in for an xbox or a Tesla...
All the while I'm waiting you out because I'm society thats gonna keep chugging along after you and your kids, and grandkids, and great grandkinds, and so on, are dead and buried, I'll implement socio/economic policies that reflect the peace and love of Christ, and the unbridled love God Has for this world (John 3:16), that lift up the impoverished, and directly benefit the poor. I'll legalize all drugs and work to eliminate the motivation for a baby born today to grow up in need or in fear so much that they are wanting to do harm to another human just to get something they don't already have or are addicted to... and with that motivation gone, the fear of needing "protection" from those people who now are as rare as a 3 sided penny, vanishes as well....
Time is no object.
That's How.
How do you, Guy who is desperately clinging to his gun today, Stop that societal sea change from happening in the next couple generations???
Why would you want to, even if you could? (BTW, You can't)