Check out Alyxgun gun Low-poly 3D model on CGTrader for $35. High-quality mesh by gspoly: 6596 polys, 3611 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 482 KB), MAX (Autodesk 3ds Max, filesize: 1.61 MB), 3DS (3D Studio, filesize: 296 KB), TBSCENE (Marmoset Toolbag, filesize: 654 KB), PNG (PNG, filesize: 94.4 MB), FBX (Autodesk FBX, filesize: 205 KB)