You have got the general shape down well. One detail that could have been improved is the scope. Since the Lego piece you used is round, there are gaps where it connects with the tiles. If you stuck the round piece on top of tiles with the connection hidden, It would have a more realistic look. Just something I noticed. Good job.
I love it but i must admit that Samuel Hepple´s studless design is my favorite. However what you have done is copy your camera pretty sweet. Also your display i like the better. But overall Hepples is just better in my oppinion. Sorry man. He gets my vote. :)