Forum Związku Ochotniczych Straży Pożarnych RP

I need to buy a scope in this case, but I don't know what to do. Suggest some proven options on this matter.

Why not consider modern scopes? For example, smart models are very popular now. Here you go https://www.atneu.com/smart-hd-weapon-sight. There you can read the specifications, get acquainted with the models and their functions and I am sure that you will be satisfied!