$25 Sci-fi Gun with amo Low-poly 3D model by zahirullahbaig. Available on CGTrader with 6180 polys and 5225 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 489 KB), OBJ (OBJ, filesize: 802 KB), SBS (Substance Designer, filesize: 394 KB), FBX (Autodesk FBX, filesize: 1.34 MB), SPP (Substance Painter, filesize: 8.46 MB), 3DS (3D Studio, filesize: 377 KB), ABC (Alembic, filesize: 596 KB), BLEND (Blender, filesize: 452 KB), MAX (Autodesk 3ds Max, filesize: 1.98 MB), SAT (3D ACIS, filesize: 17.9 MB)