Check out Fn-Scar Assault Rifle Low-poly 3D model purchase 3D model on CGTrader for $13. High-quality mesh by gegeha4: 13552 polys, 7802 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 1.46 MB), MA (Autodesk Maya, filesize: 6.6 MB), TBSCENE (Marmoset Toolbag, filesize: 1.31 MB), FBX (Autodesk FBX, filesize: 443 KB)