Check out MP9 Submachine Gun Low-poly 3D model on CGTrader for $59. High-quality mesh by luchadordev: 14364 polys, 13321 vertices. PBR, Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 80.7 MB), OBJ (OBJ, filesize: 80.7 MB), FBX (Autodesk FBX, filesize: 80.7 MB), TEXTURES (Textures, filesize: 245 MB), TBSCENE (Marmoset Toolbag, filesize: 80.7 MB), SPP (Substance Painter, filesize: 1.03 GB)