The 3d model includes two versions of the gun. The shield was not installed on all RN warships i. e. HMS Hood.
The 3d model was created using LightWave 5.6. The download file includes several scene files for the different versions of the gun. There is also an image based lighting radiosity scene file for LightWave 7+ included.
This model is ready for animation. All turning parts are hierarchical structured objects. The upper three barrels are linked to the lower barrel. The optics are IK chained. If you elevate Barrel01 (the lower barrel) all other barrels and optics will look at the new target.