Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download FPS Hangar Free.
FPS Hangar v1.1
Industrial level kit. This paсk contains 1 large hangar, buildings with interiors, props like fences, metal stairs, crates. The package has a modular architecture from which you can build your own levels, such a hangar, storage containers, open industrial location, scene, combine and many other locations. – Preview of models and Scene ready for Unity 5 now with a sample scene
– All objects of this pack are made with high textures
– 43 Low poly models
– The pack has been successfully tested on mobile devices
– A complete high resolution level ready for implementation into first-person shooter
– 57 textures (2048×2048 (Albedo, Normal, Gloss, Metalness/Specular, Occlusion, Emissive, Height)