timmy001, congrats on the new 452UL. You are going to love the rifle. It is a great rifle to shoot with open sights. I have a 452 Trainer in 17hmr and have a CZ STD match set sights (BRNO sights) mounted on the rifle and love to shoot it standing or from bench. Another poster led you to Rimfire Central (RFC) CZ sub forum for additional info on CZ rifles. If you are interested in the CZ STD match set sights, go to the RFC CZ sub forum and look for "Denny" aka "brnoman". He is a great resource for the BRNO sight sets. Please post some pics of the rifle and of the first trip to the range. Owning a CZ rifle is like eating a brand of potato chip called Lays, you just can't have one CZ; a second one will come into your possession in the near future.
Binh