I’m almost completely sure that the squared version is a relatively recent mold update.
These are both official, just two different molds. The squared version is actually the older variant, part 32209. If you take a look at the white versions of this part that came with the Toa Metru/Bahrag/Exo-Toa etc, you’ll notice that they’re all the squared version. It was used up until 2006 when it was replaced with the rounded version, part 59426. As such, for all relevant 2006 Bionicle sets it’s possible for the Zamor launcher triggers to be either variant due to when the change was made.
Much abliged to both of you sir and madam
Wasn’t one of those made with soft plastic as well? The copies I have on the Zamor shooters can flex quite a bit compared to standard technic axles.
Yes, they’re both made from polypropylene rather than standard ABS. This is because the piece originated as a wheel axle for Znap sets, which used a lot of polypropylene parts. In fact the only ABS Znap parts were the wheels and connectors
I didn’t know that, but it would explain a lot; it’s such a random axle compared to other Technic pieces.