This product includes the Optic Cut only. Sig slides are stainless steel and will not take black oxide tool finish. The optic will cover the cut.
For the Holosun K/EPS Carry the factory front sight will lower 1/4 Co-Witness.
For 1/3 Co-Witness add Angry Bear P365 Sites.
The RMRcc sits higher and requires Angry Bear P320 Sites for Co-Witness.