Since there was a request for the blend file for the colt 1911 model, I figured I'd give it a little attention. I didn't put much work into it, but it's a little more clean and the non-manifold geometry is gone.
The texture is pretty rudimentary, but I didn't know anything about the source of the original image I used so I grabbed some from Wikipedia that were listed as public domain.
The original is available here.
The revised version is here.
If you don't have Blender, get it here.