I have an old Walther 22 with a bull barrel that belongs to my father in law. It has a trigger that a good cough would trip and was told that it was an old military trainer and they were used in the Olympics but I have no idea. It has a pretty serious set of iron sights on it with several adjusters on it. Very cool gun but it has no safety so I am a little afraid of it because when its loaded it has to be fired or unloaded, there is no way to un-cock it.
I also have a single shot 9mm shotgun that he had. Now that is a bad to the bone squirrel gun. I use it around the yard and my 8 year old loves to shoot it when we go out and stomp around the fields. This is the only one I have ever seen but you can still get shells for it made by Fiochi.