Sci-fi Knife KW PBR Low-poly 3D model is available on CGTrader for $35. Original author: furqaan. Specs: 25000 polys, 12000 verts.
OBJ (OBJ, filesize: 2.59 MB), FBX (Autodesk FBX, filesize: 984 KB), MAX (Autodesk 3ds Max, filesize: 5.15 MB), 3DS (3D Studio, filesize: 1.17 MB), TBSCENE (Marmoset Toolbag, filesize: 23.3 MB), TEXTURES (Textures, filesize: 398 MB)