Yes on all counts, they are complicated, trigger and history wise. They aren't much good, but they do have that strange something. Maybe it's just the link to simpler times???
And yes there was a folding stock version... Ranger here I think, commando in Germany from the info I found.
I've seen pics of the early trigger guard with the pronounced spur. Pretty sure Sniper on here has/ had one, found old threads when I ran a search.

I like my mk2 .22 it is as good as I am, what more could I ask for?
The.177 needs some help, we have the technology... to quote a fave program from when I lusted after one first time round.