Heirinkans are pretty scarce, but I got my first one years ago from a fellow in the UK. It was the "standard sporter" version, built like a tank (like an Ace but heftier). Later I found a "target" version similar mechanically but with a broad forend/pump handle making for easy pumping, and a match aperture rearsight. I also acquired a "3Position" target rifle with Swiss-style buttplate and double-set trigger, though the pump still swings straight downward. I don't think either of these is actually the "120X" model, however.
Don R.