No they aren't, they don't exist. A lot of the finer detail on the AR is only present in the normal map, so any "depth" is an optical illusion, if you viewed the AR in-game, with a stereoscopic headset, it would appear flat with animated shading when your point of view changed. That is the beauty of artistic interpretation, the creator can realise details how he sees fit. Maybe when you make one, it can have deep vents.
This gun is the coolest thing since Antarctica.