Check out M1A1 Submachine Gun Low-poly 3D model on CGTrader for $49. High-quality mesh by luchadordev: 11994 polys, 6528 vertices. Rigged, PBR, Textured.
MAX (Autodesk 3ds Max, filesize: 64 MB), OBJ (OBJ, filesize: 64 MB), FBX (Autodesk FBX, filesize: 64 MB), SPP (Substance Painter, filesize: 1.22 GB), TEXTURES (Textures, filesize: 183 MB), TBSCENE (Marmoset Toolbag, filesize: 64 MB)