Check out Rifle Unreal 1 Low-poly 3D model on CGTrader for $2. High-quality mesh by uber-illusionist: 213684 polys, 111598 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 89.1 MB), OBJ (OBJ, filesize: 19.7 MB), FBX (Autodesk FBX, filesize: 8.93 MB), DAE (Collada, filesize: 40.7 MB)