Check out RailScales M-LOK Railcovers Pack Low-poly 3D model on CGTrader for $7. High-quality mesh by cgtdg: 7000 polys, 6500 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 145 KB), 3DS (3D Studio, filesize: 112 KB), DAE (Collada, filesize: 205 KB), DXF (DXF, filesize: 230 KB), BLEND (Blender, filesize: 81.1 MB), FBX (Autodesk FBX, filesize: 289 KB), MAX (Autodesk 3ds Max, filesize: 328 KB), TEXTURES (Textures, filesize: 161 MB), JPG (JPG, filesize: 161 MB), PNG (PNG, filesize: 161 MB)