flamethrower Gun (Polygon mesh 3D model) is available on CGTrader for $50. Original author: nouman-shah. Specs: 197763 polys, 198574 verts.
MAX (Autodesk 3ds Max, filesize: 14 MB), BLEND (Blender, filesize: 64.7 MB), OBJ (OBJ, filesize: 28.7 MB), FBX (Autodesk FBX, filesize: 10.1 MB), GLTF (glTF, filesize: 99.5 KB), SPP (Substance Painter, filesize: 79.3 MB)