Check out Malyuk Vulcan Rifle Low-poly 3D model on CGTrader for $12. High-quality mesh by Antwo3d: 14895 polys, 14516 vertices. PBR, Textured, UV Mapped.
MA (Autodesk Maya, filesize: 3.59 MB), BLEND (Blender, filesize: 2.98 MB), OBJ (OBJ, filesize: 5.83 MB), FBX (Autodesk FBX, filesize: 6.42 MB), MAX (Autodesk 3ds Max, filesize: 4.48 MB), UNITYPACKAGE (Unity 3D, filesize: 67.4 MB), TEXTURES (Textures, filesize: 192 MB)