humns seems very precise, the texturing should be very easy, since it has a smooth surface.
I'm just concerned about the polycount, you're using 18 sided which looks a little bit square so close to players view, and I dont know how your polycount is similar to a 24 sided...
16 sides
![Image](http://img338.imageshack.us/img338/1435/scope.jpg)
24 sides
just check if you don't have any duplicate or hidden faces