1). Massive prison building programs
2). Massive diversion of LEO assets
3). Massive incarceration
4). Massive black market networks
5). Thundering corruption
6). Increase in violence to effect 4)
7). Little discernible effect on the purported benefits (if any were enunciated) of prohibition.
8). Massive decline in respect for LEO and governing institutions
9). Massive social costs in terms of family break-up, lost earnings, loss of tax base

If any of this sounds familiar to other prohibitions, it is. The big diff is that tens of millions of Americans will do more than ignore or get around such a measure. They Will resist such a move.

gun confiscation can be attempted without a civil war.
You remember all the nut jobs freaking out over Jade Helm? Bundys ranch? Oath keepers in Ferguson and on the border? For every open/concealed carrier that steps into the light of public view, hundreds more are the shadows. A civil war would be playing right into their hands. I'm not saying they would win, only that they ARE going to die trying, and will take a great number of innocents with them.

However, I'd add, that most of the groups you cite, and the individuals within them, regardless of their politics, in all likelyhood just want to be left alone on the issue.

I'm not so sure that a civil war is something that they or anyone else want.

the actions would be implemented.

Much like we are seeing in New York, most people would opt for non-violent non-compliance. It appears that mostly law enforcement is siding the citizens.

Though I do not support draconian action I do critical thinking which includes how will we accomplish the idea. It appears so far that those wanting all guns confiscated or even a significant number removed from public hands have absolutely no idea how to do it. They hope it will just happen.

who are in favor of it, I always ask them to keep one thing in mind - Are YOU ready to give up the protection of the 4th Amendment?

"Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back."

So of those 80,000,000 gun owners, if Heraclitus' approximation was close to correct, more than half a million armed civilians would make ample warriors, not just Summer soldiers but warriors. A warrior is a veritable pit bull in a battle. They learn fast, they have courage in the face of superior forces and they do what it takes. I'd guess many wouldn't feel good about fighting other Americans.

I hope to never see that. There wouldn't be a winning side.

It would make the Troubles in Northern Ireland look like a minor football riot

Despite it being against Federal law?

You going to enforce it??

Unjust is unjust.

You might want to edit your sig line since you obviously don't believe in it and add something like; "... except for gun nutz, it's OK to confiscate their property with extreme prejudice if needed".