There are very few designs, the makers of matchlocks were very conservative.
Allow me to speculate :thumbsup:
Henry VIII - All snappers
Elizabeth I - Military get lever action
Charles I - Military use trigger action
Anne - Gone
When they asked the chap holding the fabulous Dresden civilian matchlock collection to detail more mechanisms, he replied, "No point, they are all the same". Then the city received an early experiment with Napalm and whether they were all the same or not became moot.
There are a couple of old drawings of castle sieges showing "one moving part" actions. If you want to believe they were real and make one, why not. After all, this is supposed to be fun :hatsoff: