Here is my second Kit bashing set. 

The geometry is fairly clean in parts, but can be cleaned up. Its for kit-bashing or concept renders and not meant to be production ready. However, if you'd like to make it production ready you can under a Freelance/Studio license.

I have not use subsurface on any of these meshes. I have added in an example on using this kitbashing set

Not included
UV maps
Perfect topology
Polycount optimization  

Jump over to Youtube.com/markom3d to see some of these assets in action. 

You are able to download either in .blend or .FBX