Used QuadFace Tools and Vertex Tools by ThomThom. It’s been a while since I used SketchUp and feel like a total noob again. Still have a few minor adjustments to make. 1 of 8 weapons I am modeling. Has 834 faces which is ok but should bring it down a little.
there are a lot of non quads in your model, but if you plan to use Artisan for the smoothing, that should be Ok.