Check out MAT-49 Submachine Gun Low-poly 3D model on CGTrader for $39. High-quality mesh by luchadordev: 24024 polys, 12639 vertices. PBR, Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 83.2 MB), OBJ (OBJ, filesize: 166 MB), FBX (Autodesk FBX, filesize: 83.2 MB), TBSCENE (Marmoset Toolbag, filesize: 83.2 MB), TEXTURES (Textures, filesize: 157 MB), SPP (Substance Painter, filesize: 537 MB)