I fully expect double stack pinned mags will be fine. It just appeared to be the single stack Canadian compliant genuine G17/34 mags that caused the bolt hold open not to work.
For those who are overly worried about last shot hold open;
If you're shooting your gun dry on a competition stage, you probably aren't winning anyways.
still like the rifle but a bit disappointing that the rifle will come with a magazine that won't let the rifle work as designed
the G26 mag which is supplied to it work perfectly. The G26 is the short (baby Glock) magazine and works great at holding the bolt open.