In "Call of Pripyat" I loved the weapon textures with the open scopes from the complete mod series. Now you can have them even with the gunplay in CoTZ!
I simply just ported the weapon textures from the complete mod for Call of Pripyat to CoTZ and tweaked some files so the open scopes would work as they should! Only issue is; the UI is not displayed correctly but its not that noticeable.
Addons I used:
CoP Gunplay for CotZ v1.3 [CotZ 1.2]