I've Said It Before, but You Don't Listen to Me.

Yeah, you know more about the law than I do...
Anyway, this comes from Andrew F. Branca: somebody I would definitely describe as being pro-gun, but some of you have problems with Andy Raymond being "pro-gun".

Here’s some breaking news for you “OCIYF!” people:
YOU HAVE ABSOLUTELY NO SECOND AMENDMENT RIGHT TO CARRY A FIREARM INTO A PRIVATELY OWNED BUSINESS.
None. Zero. Zilch. Zip.
The Second Amendment forbids the Federal government—and since McDonald also the individual state governments—from infringing on the right of the people to keep and bear arms. Key word: government.
The Second Amendment does nothing whatever to constrain the rights of private property owners to determine for themselves whether to allow the carry of guns—concealed or open—on their property.
To put it even more simply, when you are on someone else’s property you are there as an invited guest. You stay at their pleasure, and under their rules, rules that only they are entitled to define. Make your host unhappy for any reason whatever and they are entirely within their rights to order you to leave. Refuse to comply and you’ve become a criminal guilty of trespass.

Got that:  The Constitution and Bill of Rights apply to government, not private action.
He also has some choice words for the Open Carry movement as well.