ADE Advanced Optics Riser Shim Adapter Plate – 1.0 Degree Delrin Mounting Shim for Red Dot Sights – Fits Holosun 407C 507C 508T, Trijicon RMR, Riton X3 Tactix PRD Footprint Optics

https://www.amazon.com/dp/B07Y43FXK1?ref=ppx_pop_mob_ap_share This is the shim I used.

No issues for 25 yards using thishttps://a.co/d/0bQ0qrJoI have heard mixed reviews in terms of users needing the spacer and some not needing it

I have this spacer and it works fine for my Titan and ArtemisGoes between optic and Atlas plateNo issues in 5-7k roundshttps://a.co/d/0bQ0qrJo