Mauser 1898 05 Bayonet Low-poly 3D model is available on CGTrader for $15. Original author: rafal-gawenda. Specs: 10938 polys, 9819 verts.
STL (Stereolithography, filesize: 958 KB), OBJ (OBJ, filesize: 1.46 MB), FBX (Autodesk FBX, filesize: 650 KB), DAE (Collada, filesize: 2.62 MB), PLY (Ply, filesize: 533 KB)