I think red dot or scope is really a personal preference. I like the Hawke Reflex sights and have them on several pistols and a mini rifle.

With a red dot, the pistol no longer fits in the case which is really annoying. I've been re-fitting foam to the case this morning.

My pistol had a heavy trigger pull - not really suitable for a target pistol and so I did the sear and trigger spring conversion as per this youtube video : https://www.youtube.com/watch?v=2uXon9Eto50&t=160s
Trigger is now very good.

Steve.