I'm not seeing any list.
I see this under the Hex Wasp
HEX™ Wasp™ Micro Red Dot Sight - 3.5 MOA
Fits Hellcat OSP and XD-S Mod.2 OSP.
I see this under the Hex Dragonfly
HEX™ Dragonfly™ Red Dot Sight - 3.5 MOA
Fits XD-M Elite OSP with mountingplate.
The Wasp is compatible with 2 guns without any plates.
So if the Dragonfly is only "compatible" with 1 gun in the SA line up, if you use a plate, why didn't they make the slide hole pattern match the Dragonfly or the Dragonfly hole pattern match the slide? Why make it so it has to have a plate? I don't see a list of other 3rd party RDS and plates needed.
Anyway, I'm just not fond of needing a plate to make the sight fit, its jerry-rigged, which is probably why I don't own an OSP ready pistol already.