Larry, that is pretty much how it will happen and those that think their Local LEO and LEO friends will not do exactly what you just described are dreaming.
That said, I think your scenario will not be limited to those that did Not register their firearms and Mags. I fear the same thing will happen to those that did register. The cops may not find the "Illegal" stash you described, but these gun owners may be targeted as "Potential" threats, searched and harassed just the same.
I see it as lose-lose situation for all concerned.
|