Love the sawed off shotgun.
As for the last question. "Optical illusion? What do you mean?"
You're choice of colors and how you gradually fade/blend them into each other give more depth to the object they there is in reality. The blue and silver fading into the black, along with the gray tones with the black wash bringing out those details you want seen. Further more the blue compliments the silver and vis versa along with the black to the brown so the color choices bring out the above mentioned details even more. Basically creating the shadows and highlights that you get from the sun and/or light normally thus creating an optical illusion. In short it truly is larger then life and a wonderful work of Art.
As apposed to just slapping a coat of paint on it and calling it done.
Sorry, I'm really not that good with putting thought into words but I hope that describes the point I was trying to say on that last post.