ONE PIECE Whitebeards Weapon Low-poly 3D model is available on CGTrader for $2. Original author: ModelsByAT. Specs: 14497 polys, 7200 verts.
STL (Stereolithography, filesize: 708 KB), OBJ (OBJ, filesize: 943 KB), 3DS (3D Studio, filesize: 396 KB), FBX (Autodesk FBX, filesize: 357 KB), DAE (Collada, filesize: 2.2 MB), ABC (Alembic, filesize: 628 KB)