
I don't think you fairly understand polys yet.
For instance, the barrel is a 24 sided circle.
Make it a 6 sided barrel.
Also, going into sketchup with out a idea before hand can lead to models like this.
A bunch of shapes stuck together.
Go into Draw, and click Polygon.
Type the number of sides you want, hit Enter.
Make it like a normal circle.
Cuts down on Polys in the model instead of using 24 rounded sides.
Actually, It goes like this.
Select the polygon tool.
Type # of sides "12"
Then press the "s" key
Then press "enter"