Check out TAR-21 or Fort-221 Low-poly 3D model on CGTrader for $15. High-quality mesh by Kaktusryak: 16920 polys, 9220 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 5.9 MB), OBJ (OBJ, filesize: 1.48 MB), FBX (Autodesk FBX, filesize: 1.34 MB), SPP (Substance Painter, filesize: 2.19 GB)