I asked at my dealers for spare magazines for my Stoeger XM1 bullpup.
I was led to believe this rifle has the same action as the Snowflake, sorry Snowpeak P35 (don't see what was wrong with Artemis, it had a powerful classical gravitas).

It would appear that the action - or the breech at least - is different as the P35 mags don't fit. I tried a few mags. There was no obvious outward difference, but they wouldn't fit.

Were I a suspicious person, I might think things have been 'tweaked' to reduce commonality.

Can anyone shed light on this?

The XM1 trigger is "not adjustable". Is this correct?