You have got to be kidding me. Most? More like hardly any. There are a lot fewer gun owners in this country than 40 years ago, but they are much more passionate about their rights than previously.
Involuntary disarmament programs will make Iwo Jima and Tarawa look like country walks in the park.
I’ve heard of this potential disarmament scenario:
You get an audit notice to appear at X date and time.
While you’re there, your house is searched and stuff confiscated.
Feds avoid a confrontation and get your guns.
The thought is not implausible to me that disarmament would be popularly supported in response to some convenient pretext (wot, gangs, illegals) that most Americans would be nominally behind. The sacrifice of liberties for "security" seems to, in general, be rejected by only a minority (again, I hope it is a flaw in my perception, and not reality).