Check out Kriss Vector SMG Low-poly 3D model on CGTrader for $50. High-quality mesh by ParallaxGameStudios: 14716 polys, 7403 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 6.4 MB), FBX (Autodesk FBX, filesize: 1.82 MB), SPP (Substance Painter, filesize: 1.46 GB), TBSCENE (Marmoset Toolbag, filesize: 1.83 MB), TEXTURES (Textures, filesize: 511 MB)