For your consideration, here is the NATO Elcan SpectrDR 1-4x optical scope. The model is optimized, with all textures baked in. A large number of details are represented in the geometry. The model is mid-poly, and all meshes are separated and can be animated.
Technical specifications:
2 texture sets of 4096x4096Triangle count: 76,094Texel density: 197 px/cmPBR: Specular Gloss