Probably the most mechanically complicated ones I own: Diana 75
They are a 'recoilless' springer. There are two pistons, locked together by a set of gear and pinion racks. One piston goes forward to propel the pellet and the other goes rearward as a countermass. The gear mechanism is complicated in its own right but the trigger & cocking mechanism is straight up enigma machine level complicated. I took one of them apart to reseal, taking pictures along the way, and couldn't get it back together. Those that know me know I am *HIGHLY* mechanically inclined. I bought another one to look at to work on the first (memory is fuzzy but I think this one is my 3rd and the nicest example.)
They are a 'recoilless' springer. There are two pistons, locked together by a set of gear and pinion racks. One piston goes forward to propel the pellet and the other goes rearward as a countermass. The gear mechanism is complicated in its own right but the trigger & cocking mechanism is straight up enigma machine level complicated. I took one of them apart to reseal, taking pictures along the way, and couldn't get it back together. Those that know me know I am *HIGHLY* mechanically inclined. I bought another one to look at to work on the first (memory is fuzzy but I think this one is my 3rd and the nicest example.)