I have a permit in my pocket all the time:
52-page pocket Constitution of the United States (including The Bill of Rights and Amendments 11-27) & Declaration of Independence. Dimensions: 3.25″ X 6.5″.
nccs.net
What would be the purpose and source of this other permit you keep suggesting we need to have?
We've had these discussions over and over again, on this site and others, where there are posted dozens, but could easily be hundreds or thousands, of cases where multiple attackers are stopped by someone using standard (30-round) capacity AR magazines.
We've also posted many times examples of where even trained police, at very close range, miss with most shots when engaged in a shootout because shooting someone who shoots back at you is not as simple as shooting a deer during hunting season or a paper target.
And I do carry an AR-15 pistol with me, in my truck, whenever I leave home - without fail. I don't carry it inside the store but the idea that people just won't carry one is wrong. I also carry a .40 S&W pistol, 15+1 rounds and two spare mags on my person and more mags in the truck.
Before someone starts in with how "scared" I must be to carry such firepower, they'd be wrong. Because I don't go anywhere that I expect trouble, but I stay prepared for trouble if it should come unexpectedly, I have no need to be afraid. I seldom, if ever, even think about the weapons I carry except to practice at appropriate times and places so I can engage those weapons, if needed, without having to think about them.