I don’t believe I will see firearms confiscation in my lifetime (almost 40) although I fear more firearms might require registration in the future (.50 calibers for example).
Who would enforce such an action in America? Law enforcement folks I know would not do this nor would the military. I have twenty years in those institutions and that is not the constitution I swore to uphold. I am also a gun owner as is my entire extended family.
I know which side I would be on and I suspect deep down most of “them” know this.
I don't think you will ever see fire arm confiscation in the area I was raised in. When I was younger, we (A few WWII USMC vets and me) used to take some Chicago Typewriters out into the country and drink beer while poking holes in the empty cans. Almost all of the vets are lying in some federal cemetery now but the Tommy Guns still work like new. If I were you, I wouldn't worry too much about the registration of a .50 Cal, there are a lot of things out there that the government was never meant to know about. Just don't take em to town when ya do yer bankin, that has a way of making everybody nervous.
Semper Fi
An Old Man
Nevertheless, thousands of firearms are reported to have been confiscated during Katrina. A federal court has ordered them returned to their owners, but proper records weren't even created to support that.
These arms were confiscated by agents of the government, some of them being law enforcement personnel on loan from places like the People's Republik of Kalifornia.
The most publicized incident involved a California Highway Patrolman tackling an 80-year-old woman in her own house in order to take away her handgun.
Since Katrina several dozen states have passed laws clarifying that arms shall not be confiscated during emergencies, but we already had the Second Amendment to protect us, for all the good it did at the time.