So I treated myself to this Legion, want to mount a Trijicon RMR and having a tough time finding a plate. C&H has them but they have a a nub on the bottom that doesn't fit the slide due to it not having that slide cut. Thoughts ? I ordered the Springer plate and waiting for that..

Springer Precision was what I ended up with and they have an option to either add a rear sight or delete the rear sight and scoot the optic further back to the rear.

Yeah another vote for Springer. However, I do know Apex is in R&D on a plate right now. My P211 is the test bed for the prototype.

I have this one on my P226 X5-Legion, and It fit right on the slide, to mount my Trijicon SRO

CH Trijicon SRO Mount

The x5 legion has a different slide cut, doesn’t have the trench near the front where the CH plate nub fits in. Option would be to grind the nub off the bottom of the plate. CH did not recommend that.Sig says Sig red dots don’t need an adapter.

I confirm the Springer plate for the RMR cut works

I used a DPP plate on a P220 Legion optic cut slide.