Check out FN P90 Sub Machine Gun Low-poly 3D model on CGTrader for $50. High-quality mesh by ParallaxGameStudios: 15870 polys, 8124 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 8.28 MB), FBX (Autodesk FBX, filesize: 1.64 MB), SPP (Substance Painter, filesize: 1.2 GB), TBSCENE (Marmoset Toolbag, filesize: 7.45 MB), TEXTURES (Textures, filesize: 406 MB)