There is PBR low-poly gameready model of heavy tank with railgun. Machinery is moved by a gravity motor.

• Model information:
• 13606 tris and 7877 verts;
• . fbx, .obj, .blend formats;
• .png format of 4096x4096px textures (but you can decrease the resolution, which will cause to a decrease in quality);
• 7 textures of general pipeline and Unity and UE4 textures.

Unity and UE4 engines allow to use packed textures to optimize memory usage (for example, in UE4 textures, metallic map is packed in B channel of OcclusionRoughnessMetallic texture).

For any questions related to the model or problems using the UE4 and Unity textures, you can ask me.