Check out MFR XL Handguard Pack Low-poly 3D model on CGTrader for $8. High-quality mesh by Akinaro: 8500 polys, 4000 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 140 MB), BLEND (Blender, filesize: 140 MB), OBJ (OBJ, filesize: 141 MB), FBX (Autodesk FBX, filesize: 140 MB), GLTF (glTF, filesize: 190 MB)