Right Ice_killer, some big things you need to change to finish this.
Firstly to the model. Imo you can spend more triangles on this than you have, especially for the first person view. The shield is going to be right in the players face and all the moment it is quite jagged spend more triangles chamfering the corners to make it look round, same for the tuber, use 18 sides at least for the cylinder if you are already not. Also attach the shield to the barrel physically, it looks a bit strange floating right now.
The shape of the shield also looks quite off to me, it is more rounded and square than yours
http://topwar.ru/uploads/posts/2012-05/ ... 0544e6.jpg
I cant see exactly because of the renders, but it looks like you are missing the sight that goes on the user's side of the shield.
http://iiwwzone.prv.pl/panzerschreck.JPG
The uvw map, this is the biggest problem as it has very basic mistakes. Firstly, it only covers like 60% of the pixels of the map - this is all wasted space. You should be aiming for something like this
http://img.photobucket.com/albums/v294/ ... er_UVW.jpg
Now that has some problems too, some parts are a little too close, but you get the idea, any parts with nothing on it is uvw space that you could use, right now yours would look super blury up close on a 1024^2 sheet (which it should be on).
Another thing to focus on for the UVW map is things that are right in the players face, the shield and iron sights mainly, these should be the biggest pieces on the sheet, also the barrel should uvw shell should go from end to end of the map (top to bottom or side to side)
http://img706.imageshack.us/img706/887/screen001n.jpg
These are the parts you have to give lots of space as they are right up in the players face, if you give them the same amount of room as everything else they will look super blury in the 1p.
Good luck.