I will take a stab at that one. His Fourth Amendment right. The right of the people against searches and seizures shall not be violated and no Warrants shall issue but upon probably cause. Everyone knows that the word "unreasonable" is not in that amendment and even if it were, it is not like it is not unreasonable for an officer to be concerned about dealing with an armed person.
I never talked to anyone who had to fire their gun who said "I wished I had the smaller gun and fewer rounds with me" Just because you find a hundred people who agree with you on the internet does not mean you're right.