It doesn't matter. You can't sign away a basic Right.
You don't have a Second Amendment right to carry a gun on to my property against my expressed wishes anymore than I have a First Amendment right to deliver a Muslim service in your yard against your expressed wishes.
Absurd analogy. You CANNOT fire someone who keeps a koran or Bible in his car. I know this is a big step for you, Luis, but that is NOT the same as standing in your yard at midnight delivering a sermon.
You're not the steward of your own basic rights?
How incredibly dense of you to believe that.
You've conceded the gun argument at this point I see.
Now, let's move on to what we're not arguing about...
What you (and the NRA) are doing is the start of the slippery slope which can lead to Korans and Bibles being banned form the workplace.
You are advocating the will of the majority imposed on the minority via the use of legislation (force of government).
Corporations may someday be forced to fire people bringing Korans and Bibles into the workplace because the weight of popular opinion, backed by the force of government, and financed by special interest groups forced legislation into existence which decreed both inflammatory or even hate speech.
You have already laid the base for the argument when you insinuated that government financial interest in American industry that prohibited guns in the workplace was a possible violation of the Second Amendment by the government vis a vis their involvement in the enterprise.
By your same argument, allowing people to bring Bibles and Korans into a workplace were Federal (or State) monies are being spent violates (according to a large number of Americans) the Establishment clause of the Constitution.
Keep demanding more government and less individual rights...they will be only too happy to oblige.