Desperate experiment, walk with a gun in Moscow (10 photos) Bashny.Net

We all know what's going on in Moscow.
Detentions, angry police officers who take any innocent people for the symbology of the opposition.
We will not go into politics, I do not like to talk about it.
So, one guy decided to hold a desperate experiment.
He took an AK-74 and went for a walk around the capital.
Leisurely pace, he was not far from the bus station,
then went to have a snack at McDonalds, and then walked along Tverskaya.
Imagine nobody even asked where the guy in civilian clothes machine.
How can this be?
Involuntarily matures question.
What do the police involved, and how they ensure the safety of civilians?