this is lowpoly grenade with some detail part,material from blender you can animating it for your project, and you can easy explain how grenade work , model from MK2 hand grenade
STL (Stereolithography, filesize: 2.13 MB), OBJ (OBJ, filesize: 555 KB), BLEND (Blender, filesize: 2.66 MB), FBX (Autodesk FBX, filesize: 847 KB)