Laz it isn't about reading every gun magazine published, going to every gun show, or knowing all the intricacies of every gun. And thats what you are trying to make it about.
Its a legal and social question. You spew off a few gun terms and then follow with some hyperbole "Hitler and Stalin did it."
I guess thats more fun to say than Norway has strict gun registration laws. People still have a lot of guns there, so nobody is grabbing their guns.
Or perhaps Canada has no constitutional guarantee to carry a gun, but they've remained a free nation. And Swedin - etc etc.
Its a sociological and legal issue - not a gun bolt issue.
So when it comes down the real issue (legal and social) you tend to be a lot less technical and start spewing about Hitler.