Nothing particularly special, just some lower magnification scopes with better quality lenses.
Both the 2-7x33 and 1.5-4x20 have just basic quality lenses and it would be really nice to have a couple of low mag scopes with good glass so they're better in low light. The two we have are not great in very early morning or thick forests, worse if those two factors are combined.
Maybe expand on the Overgaard line of optics with some deluxe lenses in the scopes and a spotting scopes? I'm sure a lot of folks would be really enjoy having a spotting scope as an option and some new scope reticles wouldn't hurt.
To be honest, a lot of us already have pretty much everything available to buy so some new optics wouldn't hurt anyone's feelings
@lapis furnace suggested simply adding te option to change the quality of glass and reticles of the scopes we already have with in game currency, I think this might be a better option simply because it would be simpler to implement