Check out Old Rifle HK33A2 Low-poly 3D model on CGTrader for $2. High-quality mesh by darrenham: 3964 polys, 2071 vertices. PBR, Textured, UV Mapped.
MA (Autodesk Maya, filesize: 52.3 MB), OBJ (OBJ, filesize: 52.5 MB), FBX (Autodesk FBX, filesize: 52.3 MB), DAE (Collada, filesize: 52.6 MB), TEXTURES (Textures, filesize: 25.8 MB), PNG (PNG, filesize: 25.8 MB)