Check out Flip Collimator Sight Low-poly 3D model on CGTrader for $14. High-quality mesh by m4nt1core: 16970 polys, 8506 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 1.45 MB), BLEND (Blender, filesize: 4.37 MB), FBX (Autodesk FBX, filesize: 665 KB), TEXTURES (Textures, filesize: 208 MB), DAE (Collada, filesize: 2.33 MB), GLTF (glTF, filesize: 50.3 MB)