As sketchfab does not allow you to untick the Attribution box when uploading this model is sorted as CC-BY.
You can also download this file on Blendswap and is free to use in any capacity.
Can be used as scenery or game props, you can coble together a small military outpost in a few hours or build varying detailed bunkers.
Updates coming in the future for more stuff, and detail.
feel free to support me at:
Any ideas or request are welcome in the comments.