The LEO's would fight it, it would turn a routine traffic stop for a burned out tail light into a "felony" stop, to disarm the driver.
Unless an upheaval of nationwide proportions occur, it will be a State by State thing, which is fine.
Open carry in MD? NJ? NYC? I doubt it. Even FL, doesn't have an open carry provision. Hell, Some of the cops around here are like boat captains, I wouldn't go to a range or a fishing trip with some.
The namby-pamby part of our culture/society is too PC, and would have to be "educated"...Meanwhile the MSM would proclaim doom and gloom shootouts, OK Corral, (they do that now with CCW)...
I would love to see the Brady Bunch have a hissy fit though,...
National CCW, and open carry relegated to the states.