Warhammer 40K - M36 Kantrael Pattern Lasgun (Polygon mesh 3D model) is available on CGTrader for $2. Original author: Ipnospore. Specs: 53365 polys, 26888 verts.
WIRE (Autodesk Alias, filesize: 10.1 MB), OBJ (OBJ, filesize: 10.1 MB), DWG (AutoCAD, filesize: 10.1 MB), DXF (DXF, filesize: 10.1 MB), IGE (IGES, filesize: 10.1 MB), SAT (3D ACIS, filesize: 10.1 MB), STL (Stereolithography, filesize: 10.1 MB)