Any .45, if it were okay everywhere on July 4th, you would have already heard about it other places, such as on the national and local news. There would be a lot of upset anti-gun people voicing their opinions and some happy pro-gunners as well, but the story would be with the upset people.
Theophorus, I am assuming that you must mean public open carry in states where it is allowed or on private land in states where it is not allowed and that those carrying openly not violate any laws in the process.
You don't have to be patriotic or a man to open carry as described. Both descriptors are rather short sighted.
While you may think it patriotic to open carry, it is pretty darn stupid if it is being done where such activity is illegal.