I got something to say about this picture but this thread is not the right place but I will ask about the guns for now. what bore are they? whats their origin?
I dont know what you are getting at but I will play along. Yup I am curious
OK here is your answer (which I am sure you know already)

It is the Belgian FN 2000 chambered for the 5.56 x 45 NATO
Your turn