$10 Low Poly EoTech and Trijicon RedDots Low-poly 3D model by BlackHearthStudio. Available on CGTrader with 1000 polys. Check it out on CGHub.
TEXTURES (Textures, filesize: 292 MB), FBX (Autodesk FBX, filesize: 900 KB), OTHER (Other, filesize: 54.4 MB)