Bomber Bug Pack PBR is a highly customizable bug that explodes itself. Each section of the bug is a sub-mesh, allowing it to be turned on or off. You can take off the wings, the armor, the pincers or horns, or even turn it into a 4 legged bug if you so desired! Did I mention that it explodes??
https://www.infinitypbr.com/?pack=bomberBugPack
https://www.assetstore.unity3d.com/#!/content/63127