a bit of a stupid thing to admit - but i screwed up a bit, as i dunno what got into me brain, but i ordered myself a G19x gen5 slide from legion precision - as i somehow for some reason assumed the 19x slide can cycle on a standard g17 frame.
so, it does not cycle there. it all fits and fires and sets up the trigger, but slide does not go far enough to be able to pick up a round from the magazine. a rather stupid thing. anyway, so you know that for a fact now, if anybody would ever wonder. g19x frame is NOT a g17 frame. it takes g17 magazines, but isn't swappable. duh.
i cannot even find where the heck i got that idea from that it will fit.