Check out Picatinny Rail Riser Handle Low-poly 3D model on CGTrader for $4. High-quality mesh by Akinaro: 5936 polys, 2974 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 114 MB), BLEND (Blender, filesize: 114 MB), OBJ (OBJ, filesize: 120 MB), FBX (Autodesk FBX, filesize: 115 MB), GLTF (glTF, filesize: 115 MB)