This is a WW1 German Hand Grenade. I have included the PBR materials and I have tested this model in Unreal Engine 4 and can confirm that the model loads in and works. This project contains 2 assets from CC0Textures.com, licensed under CC0 1.0 Universal. Here is the explanation for the license: https://creativecommons.org/publicdomain/zero/1.0/