Check out Fragment Grenade 3D model on CGTrader for $7. High-quality mesh by madmax7777.
STL (Stereolithography, filesize: 2.14 MB), OBJ (OBJ, filesize: 4.09 MB), 3DS (3D Studio, filesize: 692 KB), AD_PRT (Alibre/Geomagic, filesize: 2.11 MB), PLY (Ply, filesize: 3.22 MB), FBX (Autodesk FBX, filesize: 468 KB), IGE (IGES, filesize: 9.24 MB), SAT (3D ACIS, filesize: 10.7 MB), DAE (Collada, filesize: 1.99 MB)