Contrary to what liberals want you to believe, a private business still has a right to refuse service to anyone they believe will negatively affect their business or their industry.
When you announce to the world that you are contemplating the purchase of an item for use other than it was intended, the prospective buyer is crossing a line.
The Buyer is not entirely honoring his side of the contract.
...And this goes doubly for firearms.
While the purchaser claims he is exercising his First Amendment Right visa-vis his Second Amendment Right, it still does not stand to compel a responsible business owner to close the transaction.
The following story pokes a giant hole into the Bloomberg and Brady Campaign position that "anyone can easily and readily purchase a firearm".
Enter Retired Astronaut and hubby of Gabby Giffords, Mark Kelly: