Check out Low Poly Weapon Pack 01 Low-poly 3D model on CGTrader for $5. High-quality mesh by ViperJr3D: 29900 polys, 15600 vertices.
MA (Autodesk Maya, filesize: 2.35 MB), BLEND (Blender, filesize: 3.16 MB), OBJ (OBJ, filesize: 3.76 MB), FBX (Autodesk FBX, filesize: 941 KB), STL (Stereolithography, filesize: 1.42 MB)