Paris Gun 1918 3D model

Simple 3d model of Paris Gun which was used for bombarind Paris in 1918 ..Only very few bad quality photos of this cannon left ( cannon was destroyed by Germany ) so no way to know all construction details.. So this is just my own vision of it. Files : Blend, FBX, OBJ . Model build with 3 parts ( base, main gun and wagon ) and it has 3 sets of textures and materials. PBR materials, textures 4096 x 4096. Best to use Blend file which every layers is separated depends on materials and textures. The model is rather not printable but i mean i never tried.