Sorry ArmedSask I take all the previous post back. I see that there is some kind of adjustment on the rs Tar21 where the hop up is on the airsoft version. My apologies.
I agree with you - the left and right pics are real steel ones used to reference what the gun looks like. The hop up pic is the only one of the airsoft version. I may be wrong , but the hop up pic is definitely not the same object as in the left and right pics. Look at other details up top around the scope.
Once again I apologize for any sarcasm.