I have a brno 601 with the 19mm dovetail and it's a real pain to find rings.
Burris make some with the recoil lug (which I need) but they are not low.
CZ USA sell a 19mm to weaver rail adaptor but then you add weight, clutter up your ejection port and it costs $75.
The current rings I have (no recoil lug hence upgrading to the burris ones) are parker hale. They have a recoil lug in the middle of the ring but I just ground that off.
There is a brand of rings that comes with a built in rail mount, all the mounting screws are hidden, I can't quite remember the name but it starts with u, urieal, unilever??? something like that.
Also rare as rocking horse sh*t factory brno/cz rings.
